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‎AddingElementVect.java‎

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import java.util.*;
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import java.io.*;
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class AddingElementVect
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{
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public static void main(String args[])
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{
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Vector v=new Vector();
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v.addElement(new Integer(10));
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v.addElement(new Integer(20));
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v.addElement(new Float(1.2));
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v.addElement(new Float(1.3));
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v.addElement(new Character('A'));
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v.addElement(new Character('S'));
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v.addElement(new String("Core"));
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v.addElement(new String("Java"));
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System.out.println(v);
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System.out.println("We will search 20");
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System.out.println("Present or not?"+v.contains(20));
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System.out.println("We will search D");
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System.out.println("Present or not?"+v.contains('D'));
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v.removeAllElements();
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System.out.println(v);
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}
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}
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‎Bitwise.java‎

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//To demonstrate bitwise operators
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import java.util.*;
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class Bitwise
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{
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public static void main(String args[])
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{
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int a,b,c,ans;
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Scanner sc=new Scanner(System.in);
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System.out.print("Enter value of a: ");
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a=sc.nextInt();
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System.out.print("Enter value of b: ");
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b=sc.nextInt();
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System.out.print("Enter value of c: ");
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c=sc.nextInt();
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ans=a & b;
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System.out.println("Bitwise ANDing a & b: "+ans);
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ans=a | b;
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System.out.println("Bitwise ORing a | b: "+ans);
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ans=a ^ b;
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System.out.println("Bitwise EX-ORing a ^ b: "+ans);
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ans=c<<1;
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System.out.println("Bitwise LEFT SHIFT c<<1: "+ans);
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ans=c>>1;
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System.out.println("Bitwise RIGHT SHIFT c>>1: "+ans);
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ans=c>>>1;
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System.out.println("Bitwise RIGHT SHIFT WITH FILL ZERO c>>>1: "+ans);
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ans=~a;
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System.out.println("Bitwise COMPLEMENT ~a: "+ans);
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}
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}
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‎MultiCatch.java‎

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class MultiCatch {
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public static void main(String args[]) {
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int a[]={5,10};
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int b=5;
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try {
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int x=a[2]/b-a[1];
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System.out.println("x= "+x);
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}
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catch(ArithmeticException e) {
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System.out.println(e);
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}
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catch(ArrayIndexOutOfBoundsException e) {
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System.out.println(e);
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}
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catch(ArrayStoreException e) {
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System.out.println(e);
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}
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int y=a[1]/a[0];
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System.out.println("y= "+y);
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}
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}

‎Pattern1.java‎

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//To print * pattern
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class Pattern1
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{
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public static void main(String [] args)
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{
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int i,j,n;
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n=Integer.parseInt(args[0]);
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for(i=1;i<=n;i++)
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{
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for(j=1;j<=i;j++)
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{
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System.out.print(" * ");
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}
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System.out.println( );
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}
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}
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}

‎Rectangle.java‎

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//Program to calculate area and perimeter of rectangle
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import java.util.*;
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class Rectangle
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{
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public static void main(String args[])
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{
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int l,b,a,p;
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System.out.print("Input length and breadth: ");
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Scanner sc=new Scanner(System.in);
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l=sc.nextInt();
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b=sc.nextInt();
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a=l*b;
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p=2*(l+b);
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System.out.println("Area: "+a);
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System.out.println("Perimeter: "+p);
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}
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}

‎ReverseNo.java‎

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//Reversing a number
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import java.lang.*; //This package is imported by default. No error occurs if we skip this line
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import java.util.*;
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class ReverseNo
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{
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public static void main(String args[])
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{
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int num,rev=0,rem;
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System.out.print("Enter a number: ");
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Scanner sc=new Scanner(System.in);
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num=sc.nextInt();
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while(num>0)
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{
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rem=num%10;
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rev=rev*10+rem;
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num=num/10;
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}
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System.out.println("Reverse: "+rev);
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}
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}

‎RunnableDemo.java‎

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//Multithreading by implementing runnable interface
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class A implements Runnable {
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public void run() {
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for(int i=1;i<=5;i++) {
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System.out.println("i = "+i);
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}
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System.out.println("Exit from A");
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}
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}
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class B implements Runnable {
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public void run() {
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for(int j=1;j<=5;j++) {
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System.out.println("j = "+j);
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}
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System.out.println("Exit from B");
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}
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}
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class C implements Runnable {
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public void run() {
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for(int k=1;k<=5;k++) {
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System.out.println("k = "+k);
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}
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System.out.println("Exit from C");
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}
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}
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class RunnableDemo {
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public static void main(String args[]) {
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A aobj = new A();
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Thread t1=new Thread(aobj);
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t1.start();
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B bobj = new B();
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Thread t2=new Thread(bobj);
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t2.start();
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C cobj = new C();
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Thread t3=new Thread(cobj);
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t3.start();
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}
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}

‎SearchlastString.java‎

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public class SearchlastString {
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public static void main(String[] args) {
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String strOrig = "Hello world ,Hello Java Students, Welcome to Java practical";
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int lastIndex = strOrig.lastIndexOf("Java");
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if(lastIndex == - 1){
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System.out.println("Java not found");
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} else {
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System.out.println("Last occurrence of Java is at index "+ lastIndex);
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}
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}
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}

‎StringReverse.java‎

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class StringReverse
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{
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public static void main(String args[])
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{
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StringBuffer sb=new StringBuffer("programming");
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System.out.println("Result: "+sb.reverse());
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}
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}

‎SwingCalendar.java‎

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import java.util.*;
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import java.awt.*;
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import java.awt.event.*;
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import javax.swing.*;
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import javax.swing.table.*;
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public class SwingCalendar extends JFrame {
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DefaultTableModel model;
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Calendar cal = new GregorianCalendar();
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JLabel label;
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SwingCalendar() {
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this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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this.setTitle("Swing Calandar");
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this.setSize(300,200);
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this.setLayout(new BorderLayout());
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this.setVisible(true);
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label = new JLabel();
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label.setHorizontalAlignment(SwingConstants.CENTER);
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JButton b1 = new JButton("<-");
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b1.addActionListener(new ActionListener() {
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public void actionPerformed(ActionEvent ae) {
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cal.add(Calendar.MONTH, -1);
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updateMonth();
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}
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});
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JButton b2 = new JButton("->");
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b2.addActionListener(new ActionListener() {
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public void actionPerformed(ActionEvent ae) {
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cal.add(Calendar.MONTH, +1);
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updateMonth();
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}
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});
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JPanel panel = new JPanel();
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panel.setLayout(new BorderLayout());
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panel.add(b1,BorderLayout.WEST);
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panel.add(label,BorderLayout.CENTER);
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panel.add(b2,BorderLayout.EAST);
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String [] columns = {"Sun","Mon","Tue","Wed","Thu","Fri","Sat"};
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model = new DefaultTableModel(null,columns);
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JTable table = new JTable(model);
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JScrollPane pane = new JScrollPane(table);
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this.add(panel,BorderLayout.NORTH);
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this.add(pane,BorderLayout.CENTER);
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this.updateMonth();
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}
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void updateMonth() {
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cal.set(Calendar.DAY_OF_MONTH, 1);
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String month = cal.getDisplayName(Calendar.MONTH, Calendar.LONG, Locale.US);
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int year = cal.get(Calendar.YEAR);
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label.setText(month + " " + year);
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int startDay = cal.get(Calendar.DAY_OF_WEEK);
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int numberOfDays = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
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int weeks = cal.getActualMaximum(Calendar.WEEK_OF_MONTH);
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model.setRowCount(0);
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model.setRowCount(weeks);
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int i = startDay-1;
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for(int day=1;day<=numberOfDays;day++){
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model.setValueAt(day, i/7 , i%7 );
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i = i + 1;
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}
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}
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public static void main(String[] arguments) {
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JFrame.setDefaultLookAndFeelDecorated(true);
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SwingCalendar sc = new SwingCalendar();
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}
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}
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