Wednesday, 29 November 2017

package com;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.UIManager;
import javax.swing.plaf.synth.SynthLookAndFeel;

/**
 *
 * @author abhijeet-tomar.blogspot.com
 */
public class Test1 
{
    JFrame frame;
    JButton button;
    JLabel label1;
    JLabel label2;
    JLabel label3;
    
    
    Test1()
    {
        
        frame = new JFrame("Look and Feel- JFrame");
        
        frame.setLayout(new org.netbeans.lib.awtextra.AbsoluteLayout());
        
        frame.setSize(400,400);
        
        label1 = new JLabel("Hi I am Swing JLabel using Look and Feel");
        
        button = new JButton("Hi I am Swing JButton using Look and Feel");
        
        frame.add(label1,new org.netbeans.lib.awtextra.AbsoluteConstraints(20, 10, 380, 40));
        
        frame.add(button,new org.netbeans.lib.awtextra.AbsoluteConstraints(20, 50, 380, 40));
        
        frame.pack();
        
        frame.setVisible(true);
        
    }
    
    public static void main(String args[])
    {
        Test1 test_obj = new Test1();
    }
    
}

Output of above code:

It is a basic output which you seen above.

If you applying Synth Look and Feel you can change everything.

Firstly we create a XML File, in Which we define properties of any Swing Component Like JLabel,JButton,JTable etc...

Foramt of XML File Like this:



    
------ We have to write code here for swing component --------

Suppose we have to change the color of Background and Foreground of any component, we have to write the code like this:

Steps:

1. Define a Style with his id.
2. Define a Font with name and size.
3. Then define its States, in code we define this for all states,
States Type:
    ENABLED
    MOUSE_OVER
    PRESSED
    DISABLED
    FOCUSED
    SELECTED
    DEFAULT
by default it is in DEFAULT state.
4. In State tag we define two Properties:
    BACKGROUND
    FOREGROUND
5. Then Bind most important tag, which bind this Style to Particular Component or All the Component.
Here we will know about Bind tag attributes Type and Key.
Type:
    Type have two values region and name.
    You can bind to individual, named components, whether or not they are also bound as regions.
Key:
    Key means its for region like Button,Label,Table Or its for named component like loginBtn,cancelBtn.
Both the properties are very important we have to learn these properties in next chapter.

We have almost completed our look and feel XML file, then we have to apply this look and feel XML.

We will write three simple lines of code for applying this XML look and feel.

  try
  {
        SynthLookAndFeel laf = new SynthLookAndFeel();
        laf.load(Test1.class.getResourceAsStream("LookFeelXml.xml"), Test1.class);
        UIManager.setLookAndFeel(laf);
 }
 catch(Exception e)
 {
       System.out.println("Exception in Loading XML File");
 }

Firstly we create SynthLookAndFeel class object and load the XML file.
Then using UIManager Class set the custom look and feel class name.

Complete program:

package com;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.UIManager;
import javax.swing.plaf.synth.SynthLookAndFeel;

/**
 *
 * @author abhi
 */
public class Test1 
{
    JFrame frame;
    JButton button;
    JLabel label1;
    JLabel label2;
    JLabel label3;
    
    
    Test1()
    {
        
        try{
        SynthLookAndFeel laf = new SynthLookAndFeel();
        laf.load(Test1.class.getResourceAsStream("LookFeelXml.xml"), Test1.class);
        UIManager.setLookAndFeel(laf);
        }
        catch(Exception e)
        {
            System.out.println("Exception in Loading XML File");
        }
        
        frame = new JFrame("Look and Feel- JFrame");
        
        frame.setLayout(new org.netbeans.lib.awtextra.AbsoluteLayout());
        
        frame.setSize(400,400);
        
        label1 = new JLabel("Hi I am Swing JLabel using Look and Feel");
        
        button = new JButton("Hi I am Swing JButton using Look and Feel");
        
        frame.add(label1,new org.netbeans.lib.awtextra.AbsoluteConstraints(20, 10, 380, 40));
        
        frame.add(button,new org.netbeans.lib.awtextra.AbsoluteConstraints(20, 50, 380, 40));
        
        frame.pack();
        
        frame.setVisible(true);
        
    }
    
    public static void main(String args[])
    {
        Test1 test_obj = new Test1();
    }
    
}

Output of above code:

Hello

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class ByteDemo

{

    public static void main(String a[]) throws Exception

    {

        int value=System.in.read();

        System.out.println(value);

        /*

        byte a1=50;

        byte b=51;

        byte result=(byte)(a1&b);

        int as=(a1&b);

        System.out.println(result);

        System.out.println(as);

        */

        /*byte b=127;

        int i=0;

        while(i<128)

        {

        System.out.println((char)i);

        i++;

        }

        byte b1=-127;

        System.out.println((char)b1);

        */

    }

}

//Synchronization in java example

class BankAccount
{
private int balance=100;

public int getBalance()
{
return balance;
}

public void withDraw(int amount)
{
balance=balance-amount;
}
}

public class OneAndTwo implements Runnable
{
private BankAccount account=new BankAccount();

public void run()
{
for(int x=0;x<10;x++)
{
makeWithDrawl(10);
if(account.getBalance()<0)
System.out.println("Overdrawn");
}
}

private void makeWithDrawl(int amount)
{
if(account.getBalance()>=amount)
{
System.out.println(Thread.currentThread().getName()+"is about to withdraw");

try
{
System.out.println(Thread.currentThread().getName()+"is going to sleep");

Thread.sleep(500);
}
catch(Exception e)
{
System.out.println(e);
}

System.out.println(Thread.currentThread().getName()+"is woke up");
account.withDraw(amount);
System.out.println(Thread.currentThread().getName()+"completes withdraw");

}
else
System.out.println("Sorry not enough for..."+Thread.currentThread().getName());

}

public static void main(String args[])
{
OneAndTwo ob1=new OneAndTwo();

Thread one=new Thread(ob1,"One");

Thread two=new Thread(ob1,"Two");

one.start();

two.start();

}

}

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