Java Collections- SET

  Write a program using hashset to add the a,b,c alphabet and remove the c alphabet and  displayed the set and size of this set.

import java.util.HashSet;

public class simplehashset {

    public static void main(String[ ] args) {

        HashSet<String> set = new HashSet<String>();

        set.add("A");

        set.add("B");

        set.add("C");

        System.out.println(set);

        set.remove("A");

        System.out.println(set);

        System.out.println(set.size());

       

    }

}

OUTPUT: 

[A, B, C]

[B, C]

2

Java collections - List

 Java collections  

A ) List

 Write a program by using arraylist and Add the number 5,2,2,1,3 and remove 2 number index (1) and arranging the ascending order

import java.util.ArrayList;

import java.util.Collections;

public class simplelist {

    public static void main(String[ ] args) {

        ArrayList<Integer> number = new ArrayList<Integer>();

        number.add(5);

        number.add(2);

        number.add(2);

        number.add(1);

        number.add(3);

        System.out.println(number);

        number.remove(2);

        Collections.sort(number);

        System.out.println(number);

    }

}

OUTPUT: 

[5, 2, 2, 1, 3]

[1, 2, 3, 5]

Java program to illustrate and defining implements extending implements class.

public class avi implements Runnable

{

       public static void main(String[] args) {

        Thread guruThread1 = new Thread("avi");

        Thread guruThread2 = new Thread("avi");

        guruThread1.start();

        guruThread2.start();

        System.out.println("Thread names are following:");

        System.out.println(guruThread1.getName());

        System.out.println(guruThread2.getName());

    }

    @Override

    public void run() {

    }

}

      output : avi 

a        avi 

Multithreading 1) Java program to illustrate and defining thread by Extending thread class.

 Multithreading 

 Java program to illustrate and defining thread by  Extending thread class. 

class Test extends Thread

{

    public void run()

    {

        System.out.println("Run method executed by child Thread");

    }

    public static void main(String[] args)

    {

        Test t = new Test();

        t.start();

        System.out.println("Main method executed by main thread");

    }

}

OUTPUT: Main method executed by main thread

Run method executed by child Thread

Design an applet/application to create form using Text Field, Text Area, Button and Label. Label 1 name : Enter your name Lable 2 name : Adress Button : submit

 

Design an applet/application to create form using Text Field, Text Area, Button and Label.  

Label 1 name : Enter your name

Lable 2 name : Adress

Button : submit

package com.javaguides.javaswing.login;

import java.awt.*;

public class BasicAWT

{

 public static void main(String args[])

 {

  Frame f = new Frame();

  f.setSize(400,400);

  f.setVisible(true);

  f.setLayout(new FlowLayout() );

 

  Label l1 = new Label();

  l1.setText("Enter Your Name ");

   

  TextField tf = new TextField(" enter name");

 

  Label l2 = new Label("Address");

  TextArea ta = new TextArea("",3,40);

 

  Button b = new Button("Submit");

   

  f.add(l1); f.add(tf); f.add(l2); f.add(ta); f.add(b);

 }

}

output: 

Develop a program to select multiple languages known to user. 1) Marathi 2) Hindi 3) English

 

Develop a program to select multiple languages known to user.

1)Marathi

2)Hindi

English 

import java.awt.*;

class Lan {

    Lan() {

        Frame f = new Frame();

        Label l1 = new Label("Select known Languages");

        l1.setBounds(100, 50, 120, 80);

        f.add(l1);

        Checkbox c2 = new Checkbox("Hindi");

        c2.setBounds(100, 150, 50, 50);

        f.add(c2);

        Checkbox c3 = new Checkbox("English");

        c3.setBounds(100, 200, 80, 50);

        f.add(c3);

        Checkbox c4 = new Checkbox("marathi");

        c4.setBounds(100, 250, 80, 50);

        f.add(c4);

        f.setSize(500, 500);

        f.setLayout(null);

        f.setVisible(true);

    }

    public static void main(String ar[]) {

        new Lan();

    }

}

OUTPUT:

Write a program to create three buttons with caption ok , reset, and cancel;

 

SWING 

import java.awt.*;

class But {

    But() {

        Frame f = new Frame();

        Button b1 = new Button("Ok");

        b1.setBounds(100, 50, 50, 50);

        f.add(b1);

        Button b2 = new Button("Reset");

        b2.setBounds(100, 101, 50, 50);

        f.add(b2);

        Button b3 = new Button("Cancel");

        b3.setBounds(100, 150, 80, 50);

        f.add(b3);

        f.setSize(500, 500);

        f.setLayout(null);

        f.setVisible(true);

    }

    public static void main(String a[]) {

        new But();

    }

   }

OUTPUT: