Java programs

CheckNumber.java

@@ -0,0 +1,22 @@
+package com.numbercheck;
+
+import java.util.Scanner;
+
+public class CheckNumber {
+	public static void main(String[]args) {
+		//Scanner sc = new Scanner(System.in);
+		//int n = sc.nextInt();
+		CheckNumber(-999);
+	}
+	public static void CheckNumber(int n) {
+	//Scanner sc = new Scanner(System.in);
+	//n = sc.nextInt();
+	if(n>0) {
+		System.out.println("Positive");
+	}else if(n<0) {
+		System.out.println("Negative");
+	}else if(n==0) {
+		System.out.println("zero");
+	}
+	}
+}

EvenOdd.java

@@ -0,0 +1,18 @@
+package com.evenodd;
+
+import java.util.Scanner;
+
+public class EvenOdd {
+	public static void main(String[] args) {
+		Scanner sc = new Scanner(System.in);
+		System.out.println("Enter the Number: ");
+		int n=sc.nextInt();
+		if (n%2==0) 
+			System.out.println("Number is EVEN");
+
+		else 
+			System.out.println("number is ODD");
+
+	}
+
+}

Method.java

@@ -0,0 +1,15 @@
+package com.method;
+
+public class Method {
+	public static void main (String[]args) {
+		calculateScore(true,800,5,100);
+		calculateScore(true,1000,8,200);
+	}
+    public static void calculateScore(boolean gameover,int score,int levelCompleted,int bonus) {
+    	if(gameover) {
+    		int finalScore = score + (levelCompleted * bonus);
+    		finalScore += 2000;
+    		System.out.println("Your Final Score was"+ finalScore);
+    	}
+    }
+}

Palindrome.java

@@ -0,0 +1,27 @@
+package com.palindrome;
+
+import java.util.Scanner;
+
+public class Palindrome {
+	public static void main (String[]args) {
+		Scanner sc = new Scanner(System.in);
+		int n,sum=0,rem;
+		System.out.println("Enter a number: ");
+		n=sc.nextInt();
+		int temp=n;
+		while(n>0)		{
+			rem=n % 10;
+			sum=(sum*10)+rem;
+			n=n / 10;
+		}
+		if(temp==sum)
+		{
+			System.out.println("Number is Palindrome");
+		}
+		else
+		{
+			System.out.println("Number is not Plaindrome");
+		}
+
+}
+}

Prime.java

@@ -0,0 +1,36 @@
+package com.Prime;
+
+public class Prime {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		java.util.Scanner sc=new java.util.Scanner(System.in);
+		System.out.println("enter number");
+
+		int n,flag=0;
+		n=sc.nextInt();
+		if(n==1 || n==0)
+		{
+		System.out.println("Prime starts from 2");
+		}
+		else
+		{	
+		for(int i=2;i<n ;i++)
+		{
+		if(n%i==0)
+		{
+		System.out.println("not a prime");
+		flag=1;
+		break;
+		}
+		}
+	   if(flag==0)
+	{
+
+		  System.out.println("prime");
+
+	}
+	}
+	}
+
+}

ReverseNumber.java

@@ -0,0 +1,30 @@
+package com.Reverse;
+
+import java.util.Scanner;
+
+public class ReverseNumber {
+	public static void main(String[] args) {
+		System.out.println("Please enter number to be reversed: ");
+        Scanner sc= new Scanner(System.in);
+        int number =sc.nextInt();
+
+        int sum = reverse(number);
+        System.out.println("Reverse of number: " + number + " is " + reverse(number));  
+	}
+	public static int reverse(int number){
+        int sum = 0;
+        int remainder;
+        do{
+            remainder = number%10;
+            sum = sum*10 + remainder;
+            number = number/10;
+
+        }while(number > 0);
+
+        return sum;
+    }
+
+}
+
+
+

StringReverse.java

@@ -0,0 +1,22 @@
+import java.util.Scanner;
+
+public class StringReverse {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+
+		//String st = "JAVA DEMO";
+		System.out.print("Enter string to reverse:");
+	     Scanner read = new Scanner(System.in);
+		 String str = read.nextLine();
+		 String reverse= "";
+
+		for(int i= str.length()-1; i>=0; i--) {
+			reverse = reverse + str.charAt(i);
+		}
+
+
+		System.out.println("Reversed String is:" + reverse +".");
+	}
+
+}

Timecalculation.java

@@ -0,0 +1,16 @@
+package com.time;
+
+public class Timecalculation {
+	public static void main(String[]args) {
+		System.out.println(Calculation(23,56));
+	}
+	public static String Calculation(long minutes,long seconds) {
+		if(minutes<0 || seconds<0 || seconds>59) {
+		return "Invalid value";
+	}
+		long hours = minutes/60;
+		long remMinutes = minutes % 60;
+		return hours + "h" + remMinutes + "m" + seconds + "s";
+	}
+
+}

Triangle.java

@@ -0,0 +1,26 @@
+package com.triangle;
+
+import java.util.Scanner;
+
+public class Triangle {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		Scanner sc = new Scanner(System.in);
+		System.out.println("enter the number");
+		int n = sc.nextInt();
+		for(int i=0;i<n ;i++)
+		{
+		for (int j=0;j<n-i-1;j++)
+		{
+		System.out.print(" ");
+		}
+		for(int k=0;k<=i; k++)
+		{
+		System.out.print("* ");
+		}
+		System.out.println( );
+		}
+	}
+
+}

fibanocci.java

@@ -0,0 +1,30 @@
+package com.fabinoccii;
+
+import java.util.Scanner;
+
+public class fibanocci {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+    Scanner sc= new Scanner(System.in);
+    System.out.println("ENTER NUMBER");
+    int n=sc.nextInt();
+    int a=0;
+    int b=1;
+    int c=0;
+    System.out.print(a);
+    System.out.print(b);
+    for (int i = 2; i <=n; i++)
+    {
+    c=a + b;
+    if(c<=n)
+    {
+    //c=a + b;
+    System.out.print(c);
+    a=b;
+    b=c;
+    }
+    }
+
+}
+}

square.java

@@ -0,0 +1,16 @@
+package com.evenodd;
+
+import java.util.Scanner;
+
+public class EvenOdd {
+	public static void main(String[] args) {
+		Scanner sc = new Scanner(System.in);
+		System.out.println("Enter the Number: ");
+		int n=sc.nextInt();
+         n = n * n;
+			System.out.println(n);
+
+
+	}
+
+}