Set Background In Mouse Adapter

Sep 9, 2014

import java.awt.FlowLayout;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextArea;
 import java.awt.BorderLayout;
import java.awt.Color;

[Code] .....

Isn't changing my backgrounds in my MouseAdapter I keep getting these errors:

at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)

[Code] ....

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Yesterday, I established a connection with oracle 12c, codes is here:
 
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where "c##mytest/myt" is username and password. It worked well.

But, today, "IO Error:The Network Adapter could not establish the connection" appeared when I tried to run my program again.

I changed //myhost into 127.0.0.1, it worked again.(Before I did this, I checked lsnrctl and regedit and firewall....., no difference)

Here is my question:

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Besides, I have some other questions:
 
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[code]....

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[Code] ....

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import java.awt.event.*;
import java.applet.*;
import java.awt.*;

[Code].....

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Image - TinyPic - Servizio di hosting d'immagini, condivisione immagini & hosting di video gratuito

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I'm creating a program to animate Button.

When Mouse is moved on JButton the Button slowly disappears and when the mouse is moved away from the Button it appears again.

Every thing is working fine except an error which i can't understand.

Java Code:

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;

public class AnimatedButton{

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[Code] ....

The error is:

XML Code: [HTML]Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: alpha value out of range
at java.awt.AlphaComposite.<init>(Unknown Source)
at java.awt.AlphaComposite.getInstance(Unknown Source)
at Animate.paintComponent(Animate.java:26)
at javax.swing.JComponent.paint(Unknown Source)

[Code] ...

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[code]...

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Java Code:

@Override
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[Code] ....

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[Code] ....

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[code]...

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