In this course, You will practice more labs of Java. This will help you to master the skills more deeply.
| Index | Name | Difficulty | Practice |
|---|---|---|---|
| 001 | 🎯 Sibling Money Division Game | ★☆☆ | Start Challenge |
| 002 | 🎯 Sum of Three-Digit Number's Digits | ★☆☆ | Start Challenge |
| 003 | 🎯 Launching Wayne's Automated Height Calculation | ★☆☆ | Start Challenge |
| 004 | 🎯 Sum Of Large Numbers | ★☆☆ | Start Challenge |
| 005 | 🎯 Optimal Coin Selection for Spring Purchase | ★☆☆ | Start Challenge |
| 006 | 🎯 Strength Training with Accumulative Method | ★☆☆ | Start Challenge |
| 007 | 🎯 Simulating a Library | ★☆☆ | Start Challenge |
| 008 | 🎯 Stair Climbing and Balance Prediction | ★☆☆ | Start Challenge |
| 009 | 🎯 Fun Code Completion | ★☆☆ | Start Challenge |
| 010 | 🎯 From One-Fourth to 0 | ★☆☆ | Start Challenge |
| 011 | 🎯 Point Inside a Triangle | ★☆☆ | Start Challenge |
| 012 | 🎯 No Money Jewelry Store Marketing | ★☆☆ | Start Challenge |
| 013 | 🎯 Summoning Elves Gameplay | ★☆☆ | Start Challenge |
| 014 | 🎯 Implementing String Split | ★☆☆ | Start Challenge |
| 015 | 🎯 Solving Apple Distribution Problem with Exceptions | ★☆☆ | Start Challenge |
| 016 | 🎯 Determine Triangle Feasibility with Exception Hand... | ★☆☆ | Start Challenge |
| 017 | 🎯 Kong Rong's Generosity | ★☆☆ | Start Challenge |
| 018 | 🎯 Remove Duplicate Numbers | ★☆☆ | Start Challenge |
| 019 | 🎯 Navigating Space Bridge with Java Arrays | ★☆☆ | Start Challenge |
| 020 | 🎯 Simple Student Management System | ★☆☆ | Start Challenge |
| 021 | 🎯 Configuring Class Parameters with Annotations | ★☆☆ | Start Challenge |
| 022 | 🎯 Define Your Annotations | ★☆☆ | Start Challenge |
| 023 | 🎯 Searching in a Two-Dimensional Array | ★☆☆ | Start Challenge |
| 024 | 🎯 Reflectively Create A Person Object | ★☆☆ | Start Challenge |
| 025 | 🎯 The Magical Pocket | ★☆☆ | Start Challenge |
| 026 | 🎯 Understanding Constant Pool | ★☆☆ | Start Challenge |
| 027 | 🎯 Storing Data Information Using TreeSet | ★☆☆ | Start Challenge |
| 028 | 🎯 String Information Statistics | ★☆☆ | Start Challenge |
| 029 | 🎯 Usage of Stream | ★☆☆ | Start Challenge |
| 030 | 🎯 Storing Data Information Using HashSet | ★☆☆ | Start Challenge |
| 031 | 🎯 Concurrent Execution of Threads | ★☆☆ | Start Challenge |
| 032 | 🎯 Data Sharing Problem in Ticketing System | ★☆☆ | Start Challenge |
| 033 | 🎯 Producer-Consumer Queue Implementation | ★☆☆ | Start Challenge |
| 034 | 🎯 Running Data Alternately In Three Groups | ★☆☆ | Start Challenge |
| 035 | 🎯 String class methods | ★☆☆ | Start Challenge |
| 036 | 🎯 String Class Constructors | ★☆☆ | Start Challenge |
| 037 | 🎯 Rewriting the equals method | ★☆☆ | Start Challenge |
| 038 | 📖 Java Localdate Parse With Formatter | ★☆☆ | Start Lab |
| 039 | 🎯 Spare Me, My Lord | ★☆☆ | Start Challenge |
| 040 | 🎯 Validating ID Card Number | ★☆☆ | Start Challenge |
| 041 | 🎯 The Wish of Five Cents | ★☆☆ | Start Challenge |
| 042 | 🎯 Love at First Sight | ★☆☆ | Start Challenge |
| 043 | 🎯 Substring Occurrence Count | ★☆☆ | Start Challenge |
| 044 | 🎯 The Only God | ★☆☆ | Start Challenge |
| 045 | 🎯 Landlord Card Game Simulation Using Java | ★☆☆ | Start Challenge |
| 046 | 🎯 Maximize Airplane Destruction Strategy | ★☆☆ | Start Challenge |
| 047 | 🎯 Nüwa Creates Humans | ★☆☆ | Start Challenge |
| 048 | 🎯 Reverse Word Order in English Sentences | ★☆☆ | Start Challenge |
| 049 | 🎯 Spaceship Speed Control | ★☆☆ | Start Challenge |
| 050 | 🎯 Dining Philosophers Synchronization | ★☆☆ | Start Challenge |
| 051 | 🎯 Configuration File Content | ★☆☆ | Start Challenge |
| 052 | 🎯 Yin and Yang | ★☆☆ | Start Challenge |
| 053 | 🎯 Blossoms Compete for Beauty | ★☆☆ | Start Challenge |
| 054 | 🎯 Building and Deploying Spring Boot | ★☆☆ | Start Challenge |
| 055 | 📖 Java LocalDate getMonth Method | ★☆☆ | Start Lab |
| 056 | 📖 Java LocalDate atTime Method | ★☆☆ | Start Lab |
| 057 | 📖 Java LocalDate isAfter Method | ★☆☆ | Start Lab |
| 058 | 📖 Java LocalDate minusYears Method | ★☆☆ | Start Lab |
| 059 | 📖 Java LocalDate Now Method | ★☆☆ | Start Lab |
| 060 | 📖 Java LocalDate Of Method | ★☆☆ | Start Lab |
| 061 | 📖 Java LocalDate Plus Method | ★☆☆ | Start Lab |
| 062 | 📖 Java LocalDate plusMonths Method | ★☆☆ | Start Lab |
| 063 | 📖 Java LocalDate Range Method | ★☆☆ | Start Lab |
| 064 | 🎯 Modify Weapon Design Using Inheritance | ★☆☆ | Start Challenge |
| 065 | 🎯 User Registration Validation with Exceptions | ★☆☆ | Start Challenge |
| 066 | 📖 Java LocalDate GetDayOfMonth Method | ★☆☆ | Start Lab |
| 067 | 📖 Java LocalDate getMonthValue Method | ★☆☆ | Start Lab |
| 068 | 📖 Java LocalDate Until Method | ★☆☆ | Start Lab |
| 069 | 📖 Java LocalDate Until Method | ★☆☆ | Start Lab |
| 070 | 🎯 Classify Words by Parts of Speech | ★☆☆ | Start Challenge |
| 071 | 📖 Java LocalDate atStartOfDay Method With Time Zone | ★☆☆ | Start Lab |
| 072 | 📖 Java LocalDate Minus Method | ★☆☆ | Start Lab |
| 073 | 📖 Java LocalDate withYear Method | ★☆☆ | Start Lab |
| 074 | 📖 Java Float doubleValue Method | ★☆☆ | Start Lab |
| 075 | 📖 Java LocalDate lengthOfYear Method | ★☆☆ | Start Lab |
| 076 | 🎯 The Wall Has Ears | ★☆☆ | Start Challenge |
| 077 | 🎯 Adding Large Integers | ★☆☆ | Start Challenge |
| 078 | 📖 Java LocalDate Now Method | ★☆☆ | Start Lab |
| 079 | 🎯 Flow Control Statements for Multiple Requirements | ★☆☆ | Start Challenge |
| 080 | 🎯 Servlet User Information Query | ★☆☆ | Start Challenge |
| 081 | 📖 Java LocalDate MinusMonth Method | ★☆☆ | Start Lab |
| 082 | 📖 Java Timer and TimerTask | ★☆☆ | Start Lab |
| 083 | 📖 Java Long floatValue Method | ★☆☆ | Start Lab |
| 084 | 📖 Java Long longValue Method | ★☆☆ | Start Lab |
| 085 | 📖 Java LocalDate plusYears Method | ★☆☆ | Start Lab |
| 086 | 📖 Java Integer Compare Method | ★☆☆ | Start Lab |
| 087 | 📖 Java LocalDate Format Method | ★☆☆ | Start Lab |
| 088 | 📖 Java LocalDate GetChronology Method | ★☆☆ | Start Lab |
| 089 | 🎯 SAX Parsing XML Data | ★☆☆ | Start Challenge |
| 090 | 📖 Java Float Max Method | ★☆☆ | Start Lab |
| 091 | 📖 Java LocalDate isSupported Method | ★☆☆ | Start Lab |
| 092 | 📖 Mastering Java Ternary Operator | ★☆☆ | Start Lab |
| 093 | 🎯 Get Information from Google Homepage | ★☆☆ | Start Challenge |
| 094 | 📖 Convert Array to ArrayList | ★☆☆ | Start Lab |
| 095 | 📖 Java LocalDate plusWeeks Method | ★☆☆ | Start Lab |
| 096 | 📖 Java Integer toBinaryString Method | ★☆☆ | Start Lab |
| 097 | 🎯 File Upload Based on UDP Protocol | ★☆☆ | Start Challenge |
| 098 | 🎯 Simulated University Management System | ★☆☆ | Start Challenge |
| 099 | 📖 Java Integer Numberofleadingzeros Method | ★☆☆ | Start Lab |
| 100 | 📖 Java Double longValue Method | ★☆☆ | Start Lab |
| 101 | 📖 Java LocalDate isLeapYear Method | ★☆☆ | Start Lab |
| 102 | 📖 Writing Data Into CSV File Using Java | ★☆☆ | Start Lab |
| 103 | 📖 Java String Split | ★☆☆ | Start Lab |
| 104 | 📖 How to Convert String to Date | ★☆☆ | Start Lab |
| 105 | 🎯 Calling a Method Twice | ★☆☆ | Start Challenge |
| 106 | 📖 Convert Array to Set | ★☆☆ | Start Lab |
| 107 | 📖 Java Long Hashcode Method | ★☆☆ | Start Lab |
| 108 | 📖 Java DoubleToRawLongBits Method | ★☆☆ | Start Lab |
| 109 | 📖 Resolving "Could Not Find or Load Main Class" Erro... | ★☆☆ | Start Lab |
| 110 | 🎯 Hello LabEx Using Java | ★☆☆ | Start Challenge |
| 111 | 📖 How to Return an Array | ★☆☆ | Start Lab |
| 112 | 📖 Convert Float to String | ★☆☆ | Start Lab |
| 113 | 📖 Optimizing Java Application Performance | ★☆☆ | Start Lab |
| 114 | 📖 Java Float isInfinite Method | ★☆☆ | Start Lab |
| 115 | 🎯 Calculating the Area of a Circle | ★☆☆ | Start Challenge |
| 116 | 🎯 Simple Interest Calculation Program | ★★★ | Start Challenge |
| 117 | 🎯 Printing Array Elements | ★★☆ | Start Challenge |
| 118 | 🎯 Output a Triangle | ★☆☆ | Start Challenge |
| 119 | 🎯 Rescue Princess with Conditional Execution | ★☆☆ | Start Challenge |
| 120 | 🎯 Alien Cell Fission | ★☆☆ | Start Challenge |
| 121 | 📖 Java Float shortValue Method | ★☆☆ | Start Lab |
| 122 | 📖 Java Localdate Tostring Method | ★☆☆ | Start Lab |
| 123 | 📖 Conversion Between String and Byte Array | ★☆☆ | Start Lab |
| 124 | 📖 Java LocalDate Get Method | ★☆☆ | Start Lab |
| 125 | 📖 Java LocalDate isBefore Method | ★☆☆ | Start Lab |
| 126 | 📖 Java Character CodePointAt Char Int Int Method | ★☆☆ | Start Lab |
| 127 | 📖 Integer Division in Java | ★☆☆ | Start Lab |
| 128 | 📖 Java Long compareTo Method | ★☆☆ | Start Lab |
| 129 | 🎯 Number of Palindromic Numbers | ★☆☆ | Start Challenge |
| 130 | 🎯 Excluding Multiples of 3 | ★★☆ | Start Challenge |
| 131 | 📖 Java Long Min Method | ★☆☆ | Start Lab |
| 132 | 🎯 Parsing XML Data Information with DOM | ★☆☆ | Start Challenge |
| 133 | 📖 Java Character lowSurrogate Method | ★☆☆ | Start Lab |
| 134 | 📖 Java Long Shortvalue Method | ★☆☆ | Start Lab |
| 135 | 🎯 Primitive Types to Wrapper Classes | ★☆☆ | Start Challenge |
| 136 | 📖 Spy in Mockito | ★☆☆ | Start Lab |
| 137 | 📖 Java Character toCodePoint Method | ★☆☆ | Start Lab |
| 138 | 📖 Java LocalDate ofYearDay Method | ★☆☆ | Start Lab |
| 139 | 📖 Convert Array to List | ★☆☆ | Start Lab |
| 140 | 📖 Java Integer reverseBytes Method | ★☆☆ | Start Lab |
| 141 | 🎯 Calculating Area of Two Triangles | ★★☆ | Start Challenge |
| 142 | 📖 Convert Double to String | ★☆☆ | Start Lab |
| 143 | 📖 Java Double IsFinite Method | ★☆☆ | Start Lab |
| 144 | 📖 How to Join Arrays | ★☆☆ | Start Lab |
| 145 | 📖 Java Integer Decode Method | ★☆☆ | Start Lab |
| 146 | 📖 Java LocalDate From Method | ★☆☆ | Start Lab |
| 147 | 📖 Java LocalDate ofEpochDay Method | ★☆☆ | Start Lab |
| 148 | 📖 Convert Char Array to String | ★☆☆ | Start Lab |
| 149 | 📖 Java Long compareUnsigned Method | ★☆☆ | Start Lab |
| 150 | 📖 Java Float byteValue Method | ★☆☆ | Start Lab |
| 151 | 🎯 Creating Enum Class - Size | ★★☆ | Start Challenge |
| 152 | 🎯 Calculate Rectangle Area | ★★☆ | Start Challenge |
| 153 | 🎯 Calculate BMI Using Weight and Height | ★★☆ | Start Challenge |
| 154 | 🎯 Simple Interest Calculator | ★☆☆ | Start Challenge |
| 155 | 🎯 Fahrenheit to Celsius Conversion Program | ★☆☆ | Start Challenge |
| 156 | 🎯 Kilometers to Miles Converter | ★☆☆ | Start Challenge |
| 157 | 🎯 Pound to Kilogram Conversion Program | ★☆☆ | Start Challenge |
| 158 | 🎯 Dividing Chocolates Among Children | ★★☆ | Start Challenge |
| 159 | 🎯 Cube Volume Calculator | ★★☆ | Start Challenge |
| 160 | 🎯 Calculating Maximum Number of Handshakes | ★☆☆ | Start Challenge |
| 161 | 🎯 Shop Profit/Loss Calculator | ★☆☆ | Start Challenge |
| 162 | 🎯 Swapping Two Numbers with Temp | ★☆☆ | Start Challenge |
| 163 | 📖 Java Long.toString Method | ★☆☆ | Start Lab |
| 164 | 📖 Check if a File Exists | ★☆☆ | Start Lab |
| 165 | 📖 Resolving Class Interface or Enum Expected Error | ★☆☆ | Start Lab |
| 166 | 🎯 Calculating the Volume of a Cylinder | ★☆☆ | Start Challenge |
| 167 | 📖 Java LocalDate getYear Method | ★☆☆ | Start Lab |
| 168 | 🎯 Calculating Employee Bonus Amount | ★★★ | Start Challenge |
| 169 | 📖 Deleting a File or Directory | ★☆☆ | Start Lab |
| 170 | 🎯 Calculate the Factorial of a Number | ★★☆ | Start Challenge |
| 171 | 🎯 Calculate Percentage with Arrays | ★★☆ | Start Challenge |
| 172 | 🎯 Calculate Mean Height of Players | ★★☆ | Start Challenge |
| 173 | 🎯 Multiplying Array Elements by 10 | ★★☆ | Start Challenge |
| 174 | 🎯 Calculating Power of a Number | ★★☆ | Start Challenge |
| 175 | 🎯 Calculating Sum of Natural Numbers | ★☆☆ | Start Challenge |
| 176 | 🎯 Counting Digits in an Integer | ★★☆ | Start Challenge |
| 177 | 🎯 Reverse a Number Program | ★★☆ | Start Challenge |
| 178 | 🎯 Calculate Sum of Digits | ★★☆ | Start Challenge |
| 179 | 📖 Generating Random Numbers in a Range | ★☆☆ | Start Lab |
| 180 | 📖 Java Character isUnicodeIdentifierStart Method | ★☆☆ | Start Lab |
| 181 | 📖 Java LocalDate getEra Method | ★☆☆ | Start Lab |
| 182 | 🎯 Verifying Class Instance | ★☆☆ | Start Challenge |
| 183 | 🎯 Print Even Numbers from Array | ★★☆ | Start Challenge |
| 184 | 🎯 Finding Factors of a Number | ★★☆ | Start Challenge |
| 185 | 🎯 Finding the GCD of Two Numbers | ★★☆ | Start Challenge |
| 186 | 📖 Files Last Modified Time | ★☆☆ | Start Lab |
| 187 | 📖 Removing Numeric Values from Java Strings | ★☆☆ | Start Lab |
| 188 | 🎯 Area of Circle with Any Radius | ★☆☆ | Start Challenge |
| 189 | 🎯 Calculating the Volume of a Cube | ★☆☆ | Start Challenge |
| 190 | 🎯 Java Engineer Salary Calculation | ★☆☆ | Start Challenge |
| 191 | 📖 Java LocalDate toEpochDay Method | ★☆☆ | Start Lab |
| 192 | 📖 Java LocalDate hashCode Method | ★☆☆ | Start Lab |
| 193 | 🎯 Find Smallest Element in Array | ★☆☆ | Start Challenge |
| 194 | 🎯 Fibonacci Sequence Programming | ★☆☆ | Start Challenge |
| 195 | 🎯 Implementing String Utility Class | ★☆☆ | Start Challenge |
| 196 | 📖 String Substring Search in Java | ★☆☆ | Start Lab |
| 197 | 📖 Java Character forDigit Method | ★☆☆ | Start Lab |
| 198 | 🎯 Determining Voting Eligibility | ★☆☆ | Start Challenge |
| 199 | 🎯 Determining Even or Odd | ★☆☆ | Start Challenge |
| 200 | 🎯 Determining Equality of Two Arguments | ★☆☆ | Start Challenge |
| 201 | 🎯 Leap Year Checker | ★☆☆ | Start Challenge |
| 202 | 🎯 Check Pass, Fail, or Invalid | ★★☆ | Start Challenge |
| 203 | 🎯 Find Youngest Brother | ★★☆ | Start Challenge |
| 204 | 🎯 Determine Student Grade | ★☆☆ | Start Challenge |
| 205 | 🎯 FizzBuzz Program: User Input Explanation | ★★☆ | Start Challenge |
| 206 | 🎯 Maximum value of three numbers. | ★☆☆ | Start Challenge |
| 207 | 📖 Convert Java String to Array | ★☆☆ | Start Lab |
| 208 | 🎯 Printing a Sentence Three Times | ★☆☆ | Start Challenge |
| 209 | 🎯 Generate Multiplication Table Using Loops | ★★☆ | Start Challenge |
| 210 | 📖 Java Character Isspacechar Method | ★☆☆ | Start Lab |
| 211 | 🎯 Valid Internal Angles of Triangle | ★★☆ | Start Challenge |
| 212 | 📖 Java Character valueOf Method | ★☆☆ | Start Lab |
| 213 | 📖 Java Integer toUnsignedString Method | ★☆☆ | Start Lab |
| 214 | 📖 Java Character isValidCodePoint Method | ★☆☆ | Start Lab |
| 215 | 🎯 Greatest Factor Excluding Itself | ★★☆ | Start Challenge |
| 216 | 🎯 Find Largest Multiple Less Than 100 | ★★☆ | Start Challenge |
| 217 | 🎯 Finding Prime Numbers in Intervals | ★★★ | Start Challenge |
| 218 | 🎯 Coexisting Chicken and Rabbit Cage | ★☆☆ | Start Challenge |
| 219 | 🎯 Calculate Sum of User Inputs | ★★☆ | Start Challenge |
| 220 | 🎯 Comparing First and Last Array Elements | ★★☆ | Start Challenge |
| 221 | 🎯 Finding the Lowest Common Multiple | ★★☆ | Start Challenge |
| 222 | 🎯 Accessing Superclass Constructor | ★★☆ | Start Challenge |
| 223 | 🎯 Determining If a Number is Armstrong | ★★☆ | Start Challenge |
| 224 | 🎯 Determining Harshad Number in Java | ★★★ | Start Challenge |
| 225 | 🎯 Creating an Animal-Dog Hierarchy | ★☆☆ | Start Challenge |
| 226 | 🎯 Multiple Classes Inheriting a Class | ★★☆ | Start Challenge |
| 227 | 🎯 Palindrome Number Check | ★★★ | Start Challenge |
| 228 | 🎯 When Can I Save Enough Money | ★☆☆ | Start Challenge |
| 229 | 📖 How to Find Maximum Value Map | ★☆☆ | Start Lab |
| 230 | 🎯 Identifying Abundant Numbers Using Java | ★★★ | Start Challenge |
| 231 | 🎯 Determining Self-Dividing Numbers | ★★★ | Start Challenge |
| 232 | 📖 Sorting ArrayList in Java | ★☆☆ | Start Lab |
| 233 | 🎯 Obtaining Class Objects of Different Classes | ★☆☆ | Start Challenge |
| 234 | 📖 Creating Copy Constructors in Java | ★☆☆ | Start Lab |
| 235 | 📖 Check File Readability and Writability | ★☆☆ | Start Lab |
| 236 | 📖 How to Call a Method | ★☆☆ | Start Lab |
| 237 | 📖 Java Float Min Method | ★☆☆ | Start Lab |
| 238 | 🎯 How Many Days in Each Month | ★☆☆ | Start Challenge |
| 239 | 📖 Java Integer Divideunsigned Method | ★☆☆ | Start Lab |
| 240 | 🎯 Check Prime Number | ★★☆ | Start Challenge |
| 241 | 🎯 Determining Prime Number Status | ★★☆ | Start Challenge |
| 242 | 📖 Character Frequency in Java Strings | ★☆☆ | Start Lab |
| 243 | 📖 Mastering Java Array Initialization Techniques | ★☆☆ | Start Lab |
| 244 | 📖 Java Float Compare Method | ★☆☆ | Start Lab |
| 245 | 🎯 Enum Constants as Strings | ★★☆ | Start Challenge |
| 246 | 🎯 Implement a Stock class | ★☆☆ | Start Challenge |
| 247 | 📖 Java Character getNumericValue Method | ★☆☆ | Start Lab |
| 248 | 📖 Java Character isLetterOrDigit Method | ★☆☆ | Start Lab |
| 249 | 📖 Java Character toTitleCase Method | ★☆☆ | Start Lab |
| 250 | 📖 Bitwise XOR Operator in Java | ★☆☆ | Start Lab |
| 251 | 🎯 Calculate Rectangle Area | ★★☆ | Start Challenge |
| 252 | 🎯 Subtraction of Coordinates | ★★☆ | Start Challenge |
| 253 | 📖 Java Character isISOControl Method | ★☆☆ | Start Lab |
| 254 | 📖 Java Double isInfinite Method | ★☆☆ | Start Lab |
| 255 | 📖 Java LocalDate withDayOfYear Method | ★☆☆ | Start Lab |
| 256 | 📖 Java Double Sum Method | ★☆☆ | Start Lab |
| 257 | 📖 Java LocalDate compareTo Method | ★☆☆ | Start Lab |
| 258 | 📖 Java Long Reverse Bytes Method | ★☆☆ | Start Lab |
| 259 | 📖 Java Float floatToRawIntBits Method | ★☆☆ | Start Lab |
| 260 | 📖 Create ArrayList From Array | ★☆☆ | Start Lab |
| 261 | 📖 How to Repeat a String N Times | ★☆☆ | Start Lab |
| 262 | 📖 Java Character isIdentifierIgnorable Method | ★☆☆ | Start Lab |
| 263 | 📖 Java DoubleToLongBits Method | ★☆☆ | Start Lab |
| 264 | 📖 Java Integer longValue Method | ★☆☆ | Start Lab |
| 265 | 📖 Java Integer RotateLeft Method | ★☆☆ | Start Lab |
| 266 | 📖 Java Integer ValueOf Method | ★☆☆ | Start Lab |
| 267 | 📖 Java Long Decode Method | ★☆☆ | Start Lab |
| 268 | 📖 Adding a Newline Character to a String | ★☆☆ | Start Lab |
| 269 | 📖 Convert String to ArrayList | ★☆☆ | Start Lab |
| 270 | 📖 Java Character IsLetter Method | ★☆☆ | Start Lab |
| 271 | 📖 Identify Unicode Identifier Parts in Java | ★☆☆ | Start Lab |
| 272 | 📖 Java Character isWhitespace Method | ★☆☆ | Start Lab |
| 273 | 📖 Java Long Compare Method | ★☆☆ | Start Lab |
| 274 | 📖 Formatting With Printf | ★☆☆ | Start Lab |
| 275 | 🎯 Adding Complex Numbers | ★★☆ | Start Challenge |
| 276 | 📖 Java Character reverseBytes Method | ★☆☆ | Start Lab |
| 277 | 📖 Java LocalDate withMonth Method | ★☆☆ | Start Lab |
| 278 | 🎯 Modify Elements in HashMap | ★★☆ | Start Challenge |
| 279 | 🎯 Removing Elements from a HashMap | ★☆☆ | Start Challenge |
| 280 | 📖 Convert String to Byte | ★☆☆ | Start Lab |
| 281 | 🎯 Multiple Class Method Overriding | ★☆☆ | Start Challenge |
| 282 | 🎯 Overriding Parent Class Method | ★☆☆ | Start Challenge |
| 283 | 📖 Java Integer numberOfTrailingZeros Method | ★☆☆ | Start Lab |
| 284 | 📖 Java Integer RemainderUnsigned Method | ★☆☆ | Start Lab |
| 285 | 📖 Java Long doubleValue Method | ★☆☆ | Start Lab |
| 286 | 📖 Java Long Reverse Method | ★☆☆ | Start Lab |
| 287 | 📖 Java Localdate Getdayofweek Method | ★☆☆ | Start Lab |
| 288 | 📖 Java Integer floatValue Method | ★☆☆ | Start Lab |
| 289 | 🎯 String Conversion: First Letter Uppercase | ★★★ | Start Challenge |
| 290 | 📖 Creating Custom Java Exceptions | ★☆☆ | Start Lab |
| 291 | 📖 Java Long Signum Method | ★☆☆ | Start Lab |
| 292 | 📖 Single Line List Initialization | ★☆☆ | Start Lab |
| 293 | 🎯 Adding Elements to ArrayLists at Specific Index | ★★☆ | Start Challenge |
| 294 | 🎯 Adding Elements to ArrayList | ★☆☆ | Start Challenge |
| 295 | 🎯 Reverse One-Dimensional Array in Java | ★☆☆ | Start Challenge |
| 296 | 📖 Java ArrayList to HashSet Conversion | ★☆☆ | Start Lab |
| 297 | 🎯 Determining IcyHot Temperature | ★☆☆ | Start Challenge |
| 298 | 🎯 Implement Interface to Calculate Square Area | ★★★ | Start Challenge |
| 299 | 🎯 Find Differences Between Two Hashsets | ★★☆ | Start Challenge |
| 300 | 📖 Writing a File | ★☆☆ | Start Lab |
| 301 | 📖 Java 8 Date and Time API | ★☆☆ | Start Lab |
| 302 | 📖 Java Integer rotateRight Method | ★☆☆ | Start Lab |
| 303 | 🎯 Find Longer String | ★★★ | Start Challenge |
| 304 | 📖 Java Json Libraries | ★☆☆ | Start Lab |
| 305 | 🎯 Printing Individual Characters in a String | ★★☆ | Start Challenge |
| 306 | 🎯 Efficient Student Grade Analysis Program | ★☆☆ | Start Challenge |
| 307 | 📖 Checking if a String Is Numeric | ★☆☆ | Start Lab |
| 308 | 📖 Modulo Operator in Java | ★☆☆ | Start Lab |
| 309 | 📖 Java Character toUpperCase Method | ★☆☆ | Start Lab |
| 310 | 📖 Java Character isLowerCase Method | ★☆☆ | Start Lab |
| 311 | 📖 Java Integer Reverse Method | ★☆☆ | Start Lab |
| 312 | 📖 Java Long Max Method | ★☆☆ | Start Lab |
| 313 | 🎯 Counting the Occurrences of a Substring | ★☆☆ | Start Challenge |
| 314 | 🎯 Counting Occurrences of Character 'a' | ★★☆ | Start Challenge |
| 315 | 🎯 Count the Vowels in a String | ★★☆ | Start Challenge |
| 316 | 🎯 String Concatenation: Two Texts Combined | ★☆☆ | Start Challenge |
| 317 | 🎯 Overload Final Method Demonstration | ★★★ | Start Challenge |
| 318 | 🎯 Displaying Data Information Using Iterator | ★☆☆ | Start Challenge |
| 319 | 📖 Java LocalDate GetDayOfYear Method | ★☆☆ | Start Lab |
| 320 | 📖 Java LocalDate Now Method | ★☆☆ | Start Lab |
| 321 | 📖 Convert Integer List to Int Array | ★☆☆ | Start Lab |
| 322 | 📖 Read XML File | ★☆☆ | Start Lab |
| 323 | 📖 Java Character isIdentifierIgnorable Method | ★☆☆ | Start Lab |
| 324 | 📖 Java Integer to Binary Conversion | ★☆☆ | Start Lab |
| 325 | 📖 Java Double toHexString Method | ★☆☆ | Start Lab |
| 326 | 📖 Java Integer shortValue Method | ★☆☆ | Start Lab |
| 327 | 🎯 Calculating Standard Deviation in Java | ★★★ | Start Challenge |
| 328 | 📖 Read a CSV File | ★☆☆ | Start Lab |
| 329 | 📖 How to Convert Stream to an Array | ★☆☆ | Start Lab |
| 330 | 🎯 Accessing Static Properties in a Class | ★☆☆ | Start Challenge |
| 331 | 📖 Java Character Digit Method | ★☆☆ | Start Lab |
| 332 | 📖 Java Character isSpaceChar Method | ★☆☆ | Start Lab |
| 333 | 📖 Java Character toTitleCase Method | ★☆☆ | Start Lab |
| 334 | 📖 Java Double Min Method | ★☆☆ | Start Lab |
| 335 | 📖 Java Float intBitsToFloat Method | ★☆☆ | Start Lab |
| 336 | 📖 Java Float intValue Method | ★☆☆ | Start Lab |
| 337 | 📖 Java Long numberOfTrailingZeros Method | ★☆☆ | Start Lab |
| 338 | 📖 Java Long parseUnsignedLong Method | ★☆☆ | Start Lab |
| 339 | 📖 Java Long remainderUnsigned Method | ★☆☆ | Start Lab |
| 340 | 📖 Remove Element From a Java Map | ★☆☆ | Start Lab |
| 341 | 📖 Sort HashSet Elements | ★☆☆ | Start Lab |
| 342 | 📖 Java Character isJavaIdentifierStart Method | ★☆☆ | Start Lab |
| 343 | 📖 Java Character isTitleCase Method | ★☆☆ | Start Lab |
| 344 | 📖 Java Float floatValue Method | ★☆☆ | Start Lab |
| 345 | 📖 Java Long toHexString Method | ★☆☆ | Start Lab |
| 346 | 📖 Recursive Merge Sort Implementation in Java | ★☆☆ | Start Lab |
| 347 | 🎯 Print Non-Alphabet Characters | ★★★ | Start Challenge |
| 348 | 📖 How to Convert String Date to Timestamp | ★☆☆ | Start Lab |
| 349 | 📖 Java Character isJavaIdentifierPart Method | ★☆☆ | Start Lab |
| 350 | 🎯 Method Overloading for Different Parameters | ★★★ | Start Challenge |
| 351 | 📖 Java Integer CompareUnsigned Method | ★☆☆ | Start Lab |
| 352 | 📖 Java Long LowestOneBit Method | ★☆☆ | Start Lab |
| 353 | 🎯 Divide Apples with Exception Handling | ★☆☆ | Start Challenge |
| 354 | 🎯 Release Scanner Resource using finally | ★☆☆ | Start Challenge |
| 355 | 🎯 Building a Simple Calculator | ★★☆ | Start Challenge |
| 356 | 📖 Java Float isNaN Method | ★☆☆ | Start Lab |
| 357 | 🎯 Managing Employee Salary with Encapsulation | ★★★ | Start Challenge |
| 358 | 📖 Java Float parseFloat Method | ★☆☆ | Start Lab |
| 359 | 📖 Java Character toLowerCase Method | ★☆☆ | Start Lab |
| 360 | 📖 JLambda Expressions and Stream API | ★☆☆ | Start Lab |
| 361 | 📖 Java Integer Min Method | ★☆☆ | Start Lab |
| 362 | 📖 How to Join Two ArrayList | ★☆☆ | Start Lab |
| 363 | 🎯 Design and Implementation of Multiple Interfaces | ★☆☆ | Start Challenge |
| 364 | 📖 Java Character isTitleCase Method | ★☆☆ | Start Lab |
| 365 | 📖 Substring Replacement in Java | ★☆☆ | Start Lab |
| 366 | 📖 Java Integer toUnsignedLong Method | ★☆☆ | Start Lab |
| 367 | 📖 Java Long toOctalString Method | ★☆☆ | Start Lab |
| 368 | 🎯 Narcissistic Number Judgment | ★☆☆ | Start Challenge |
| 369 | 🎯 Area Calculation Program using Abstraction | ★★★ | Start Challenge |
| 370 | 🎯 Print Value of Any Data Type | ★☆☆ | Start Challenge |
| 371 | 🎯 Method Overloading with Different Parameter Types | ★★★ | Start Challenge |
| 372 | 🎯 Print Any Type of Data | ★★☆ | Start Challenge |
| 373 | 📖 Reverse String in Java | ★☆☆ | Start Lab |
| 374 | 🎯 Accessing Overridden Method of Superclass | ★★☆ | Start Challenge |
| 375 | 🎯 Outputting Book Info | ★☆☆ | Start Challenge |
| 376 | 📖 Java Math Pow Method | ★☆☆ | Start Lab |
| 377 | 📖 Java Character codePointCount Method | ★☆☆ | Start Lab |
| 378 | 📖 Converting Between an Array and List | ★☆☆ | Start Lab |
| 379 | 📖 Convert Char to String | ★☆☆ | Start Lab |
| 380 | 📖 Implementing a Binary Search Tree | ★☆☆ | Start Lab |
| 381 | 🎯 Implementing Pascal's Triangle | ★☆☆ | Start Challenge |
| 382 | 📖 Java Character isUnicodeIdentifierStart Method | ★☆☆ | Start Lab |
| 383 | 📖 Java Float to String Conversion | ★☆☆ | Start Lab |
| 384 | 📖 Copy Files Using Java Files Class | ★☆☆ | Start Lab |
| 385 | 📖 How to Join Strings | ★☆☆ | Start Lab |
| 386 | 🎯 Modifying an ArrayList with Java | ★★☆ | Start Challenge |
| 387 | 📖 Check if Input Is Integer | ★☆☆ | Start Lab |
| 388 | 📖 Check if Directory Exists | ★☆☆ | Start Lab |
| 389 | 🎯 Implementing a Queue Using a LinkedList | ★★★ | Start Challenge |
| 390 | 📖 Java Character getName Method | ★☆☆ | Start Lab |
| 391 | 🎯 Calculating the Area of a Square | ★★★ | Start Challenge |
| 392 | 🎯 Custom Regular Expression | ★☆☆ | Start Challenge |
| 393 | 🎯 Class Methods Retriever Information | ★☆☆ | Start Challenge |
| 394 | 📖 Java ArrayList to LinkedHashSet Conversion | ★☆☆ | Start Lab |
| 395 | 📖 Convert Int to String | ★☆☆ | Start Lab |
| 396 | 🎯 Accessing Elements of a HashMap | ★☆☆ | Start Challenge |
| 397 | 📖 How to Get File Extension | ★☆☆ | Start Lab |
| 398 | 🎯 Accessing Static Properties from Another Class | ★☆☆ | Start Challenge |
| 399 | 📖 Java Integer Hashcode Method | ★☆☆ | Start Lab |
| 400 | 📖 Java Integer Equals Method | ★☆☆ | Start Lab |
| 401 | 🎯 Matrix element information printing | ★☆☆ | Start Challenge |
| 402 | 📖 Implementing Dijkstra's Algorithm | ★☆☆ | Start Lab |
| 403 | 📖 Convert List to Array | ★☆☆ | Start Lab |
| 404 | 📖 Introduction to Orgjson | ★☆☆ | Start Lab |
| 405 | 📖 Java Character hashCode Method | ★☆☆ | Start Lab |
| 406 | 📖 Java Float hashCode Method | ★☆☆ | Start Lab |
| 407 | 🎯 Finding Minimum and Maximum Student Marks | ★★☆ | Start Challenge |
| 408 | 📖 Java Character isLowSurrogate Method | ★☆☆ | Start Lab |
| 409 | 📖 Java Integer intValue Method | ★☆☆ | Start Lab |
| 410 | 📖 Java Integer parseInt Method | ★☆☆ | Start Lab |
| 411 | 📖 Java Integer parseUnsignedInt Method | ★☆☆ | Start Lab |
| 412 | 📖 Java Integer ValueOf String Method | ★☆☆ | Start Lab |
| 413 | 📖 Java Long parseLong Method | ★☆☆ | Start Lab |
| 414 | 📖 Java Long toUnsignedString Method | ★☆☆ | Start Lab |
| 415 | 📖 Rounding Floating-Point Numbers in Java | ★☆☆ | Start Lab |
| 416 | 📖 Java Double Equals Method | ★☆☆ | Start Lab |
| 417 | 🎯 Remove Second Element From ArrayList | ★★☆ | Start Challenge |
| 418 | 🎯 Accessing Elements in a LinkedList | ★☆☆ | Start Challenge |
| 419 | 🎯 Checking String Equality | ★★☆ | Start Challenge |
| 420 | 🎯 Implement Deque Data Structure | ★★★ | Start Challenge |
| 421 | 🎯 Set a price for attractions tickets | ★☆☆ | Start Challenge |
| 422 | 🎯 Find Intersection of Two HashSets | ★★☆ | Start Challenge |
| 423 | 📖 Java Character Codepointat Charsequence Int Method | ★☆☆ | Start Lab |
| 424 | 📖 Java Integer toString Method | ★☆☆ | Start Lab |
| 425 | 📖 Java Formatting Strings | ★☆☆ | Start Lab |
| 426 | 📖 Java Character CodePointCount Method | ★☆☆ | Start Lab |
| 427 | 📖 Java Double parseDouble Method | ★☆☆ | Start Lab |
| 428 | 🎯 Implementing Multilevel Inheritance | ★★☆ | Start Challenge |
| 429 | 📖 Java Character toString Method | ★☆☆ | Start Lab |
| 430 | 📖 Java Double Max Method | ★☆☆ | Start Lab |
| 431 | 🎯 Counting Character Occurrences | ★☆☆ | Start Challenge |
| 432 | 🎯 Implementing Queue Manually | ★☆☆ | Start Challenge |
| 433 | 🎯 Draw Geometric Shapes | ★☆☆ | Start Challenge |
| 434 | 📖 Count Occurrences of a Character | ★☆☆ | Start Lab |
| 435 | 📖 Java Character Equals Method | ★☆☆ | Start Lab |
| 436 | 📖 Java Character GetType Codepoint Method | ★☆☆ | Start Lab |
| 437 | 📖 Checking Palindromes in Java | ★☆☆ | Start Lab |
| 438 | 🎯 Sort Players' Ages Ascending Order | ★☆☆ | Start Challenge |
| 439 | 🎯 Default Methods in Multiple Interfaces | ★☆☆ | Start Challenge |
| 440 | 📖 Utilizing Pairs in Java Programming | ★☆☆ | Start Lab |
| 441 | 🎯 Create Linked List with Index | ★☆☆ | Start Challenge |
| 442 | 📖 Converting ArrayList to LinkedList | ★☆☆ | Start Lab |
| 443 | 🎯 Implementing Lambda Expression with Parameters | ★★★ | Start Challenge |
| 444 | 🎯 Implement Encryption and Decryption | ★☆☆ | Start Challenge |
| 445 | 🎯 Lambda Expressions For Data Operations | ★☆☆ | Start Challenge |
| 446 | 📖 Mastering Java Generics Concepts | ★☆☆ | Start Lab |
| 447 | 📖 Java Character isSurrogate Method | ★☆☆ | Start Lab |
| 448 | 🎯 Student Score Ranking System | ★☆☆ | Start Challenge |
| 449 | 🎯 Access and Modify Student Name | ★☆☆ | Start Challenge |
| 450 | 📖 Java Character toString Method | ★☆☆ | Start Lab |
| 451 | 📖 Java Float toString Method | ★☆☆ | Start Lab |
| 452 | 🎯 Business Card Distribution | ★☆☆ | Start Challenge |
| 453 | 🎯 Finding Nemo in ArrayList | ★☆☆ | Start Challenge |
| 454 | 🎯 Writing Objects to File | ★☆☆ | Start Challenge |
| 455 | 📖 Java Heap Memory Error | ★☆☆ | Start Lab |
| 456 | 📖 Add Elements to Array and ArrayList | ★☆☆ | Start Lab |
| 457 | 🎯 Intersection of Linked Lists | ★☆☆ | Start Challenge |
| 458 | 🎯 Reverse Output Word List | ★☆☆ | Start Challenge |
| 459 | 📖 Immutable Strings in Java Programming | ★☆☆ | Start Lab |
| 460 | 🎯 Caesar Cipher Encryption | ★☆☆ | Start Challenge |
| 461 | 🎯 Design and Implementation of Graphic Interface | ★☆☆ | Start Challenge |
| 462 | 📖 Java Binary Search | ★☆☆ | Start Lab |
| 463 | 📖 Java Character toString Method | ★☆☆ | Start Lab |
| 464 | 📖 Java Integer toString Method | ★☆☆ | Start Lab |
| 465 | 📖 Parse Unsigned Integer | ★☆☆ | Start Lab |
| 466 | 📖 Sorting Techniques in Java | ★☆☆ | Start Lab |
| 467 | 📖 Java Enum Fundamentals | ★☆☆ | Start Lab |
| 468 | 📖 Sorting a HashMap | ★☆☆ | Start Lab |
| 469 | 📖 Efficient QuickSort Divide-and-Conquer Algorithm | ★☆☆ | Start Lab |
| 470 | 🎯 Automotive Sales Market | ★☆☆ | Start Challenge |
| 471 | 📖 Java Long toString Method | ★☆☆ | Start Lab |
| 472 | 🎯 File Content Filtering | ★☆☆ | Start Challenge |
| 473 | 🎯 Operations with Method References | ★☆☆ | Start Challenge |
| 474 | 📖 How to Read a File to String | ★☆☆ | Start Lab |
| 475 | 🎯 Handling Incorrect Grades | ★☆☆ | Start Challenge |
| 476 | 📖 Sorting Java Map by Values | ★☆☆ | Start Lab |
| 477 | 📖 Introduction to Java Tuples | ★☆☆ | Start Lab |
| 478 | 📖 Graph Data Structures in Java | ★☆☆ | Start Lab |
| 479 | 📖 Remove Duplicates From ArrayList | ★☆☆ | Start Lab |
| 480 | 📖 Java Long toString Method | ★☆☆ | Start Lab |
| 481 | 📖 Creating a Swap Function | ★☆☆ | Start Lab |
| 482 | 🎯 Bank Account Program | ★☆☆ | Start Challenge |
| 483 | 📖 Efficient Text Processing with Java BufferedReader | ★☆☆ | Start Lab |
| 484 | 🎯 Using Inheritance to Save Code | ★☆☆ | Start Challenge |
| 485 | 📖 Java Assertions: Testing Assumptions | ★☆☆ | Start Lab |
| 486 | 📖 Mastering Java TreeMap Data Structure | ★☆☆ | Start Lab |
| 487 | 📖 Shallow vs. Deep Object Copying | ★☆☆ | Start Lab |
| 488 | 📖 Java Float Hashcode Method | ★☆☆ | Start Lab |
| 489 | 📖 How to Convert Enum to String | ★☆☆ | Start Lab |
| 490 | 📖 Comparator and Comparable | ★☆☆ | Start Lab |
| 491 | 📖 Convert InputStream to String | ★☆☆ | Start Lab |
| 492 | 🎯 Enum Class for Gender Information | ★☆☆ | Start Challenge |
| 493 | 📖 How to Create an Object | ★☆☆ | Start Lab |
| 494 | 🎯 Implement Countdown Timer Thread | ★☆☆ | Start Challenge |
| 495 | 📖 Mastering Java Hashing and HashCode | ★☆☆ | Start Lab |
| 496 | 📖 Java POJO Class | ★☆☆ | Start Lab |
| 497 | 🎯 Optimizing Threaded Relay Race Simulation | ★☆☆ | Start Challenge |
| 498 | 📖 Java Serialization and Deserialization | ★☆☆ | Start Lab |
| 499 | 📖 Reading a CSV File | ★☆☆ | Start Lab |
| 500 | 🎯 Student Management System | ★☆☆ | Start Challenge |
| 501 | 📖 Java Stream Filter | ★☆☆ | Start Lab |
| 502 | 🎯 Intelligent Care Call Service | ★☆☆ | Start Challenge |
| 503 | 📖 Java String Concatenation | ★☆☆ | Start Lab |
| 504 | 📖 Sorting Strings in Java using Arrays.sort() | ★☆☆ | Start Lab |
| 505 | 🎯 Enter student information | ★☆☆ | Start Challenge |
| 506 | 🎯 Class Properties and Methods | ★☆☆ | Start Challenge |
| 507 | 📖 Java 11 New Features | ★☆☆ | Start Lab |
| 508 | 🎯 Class Grade Ranking | ★☆☆ | Start Challenge |
| 509 | 🎯 Chat Room Simulation | ★★☆ | Start Challenge |