收集java的常用函数代码！大家分享，共同学习！请分享者到此接分[续一]！

[jdlsfl]

由于无私的分享者很多，原贴分数不够，请到此接分！

原贴：http://topic.csdn.net/u/20080701/23/3390e185-d6c1-43d0-9222-ad03d2e303a6.html

至于内部代码，各位自行整理学习！

[skylovehang]

接分

[feng2112]

mark

[ian63]

送大家一个，我常用的配置文件管理类，多个配置文件大家就自己写个工厂类来管理吧：

public class PropertiesTool {
	private Hashtable cachedFile = new Hashtable();
	
	/**
	 * constructor
	 * @param fileName
	 */
	public PropertiesTool(String fileName){
		getPropertiesFromClasspath(fileName);
	}
	
	public void getPropertiesFromClasspath(String file){
		ResourceBundle rb = ResourceBundle.getBundle(file);
		Enumeration en = rb.getKeys();
		while(en.hasMoreElements()){
			String key = String.valueOf(en.nextElement());
			cachedFile.put(key,rb.getString(key));
		}
	}
	
	public String getValueByKey(String key){
		if (cachedFile!=null && cachedFile.size()!=0 && key !=null) {
			return String.valueOf(cachedFile.get(key));
		}
		return "no data found";
	}
	
	public int getDataCount(){
		if (cachedFile!=null) {
			return cachedFile.size();
		}else{
			return 0;
		}
	}
	
	public List getKeys(){
		List result = new ArrayList();
		Enumeration en = cachedFile.keys();
		if (cachedFile!=null) {
			while (en.hasMoreElements()) {
				result.add(en.nextElement());
			}
		}
		return result;
	}

[xl_nj]

好东西

[skylovehang]

我接分

[daibu]

[Quote=引用 5 楼 java2000_net 的回复:]
jfjf
[/Quote]

[叶涛网站推广优化]

jfjf

[叶涛网站推广优化]

jfjf

[sxn19811006]

xx

[nick6610]

顶

[cuixiuqin1954]

顶起

[gloomy98]

厉害啊

[zzkk_1980]

[Quote=引用 7 楼 ZangXT 的回复:]
精华
[/Quote]

[善桀]

口水泛滥........正在温习

[kahn178]

//ShowColors.java
//Demonstrating Colors.

//Java Core packages
import java.awt.*;
import java.awt.event.*;

//java extension packages
import javax.swing.*;

public class ShowColors extends JFrame{
	
	//constructor sets window's title bar string and dimension
	public ShowColors()
	{
		super("Using colors");
		
		setSize(400,130);
		setVisible(true);
		
	}
	//draw rectangles and Strings in different colors
	public void paint(Graphics g)
	{
		//call superclass's paint method
		super.paint(g);
		
		//set new drawing colors using integers
		g.setColor(new Color(255,0,0));
		g.fillRect(25,25,100,20);
		g.drawString("Current RGB:"+g.getColor(),130,40);
		
		//set new drawing color using floats
		g.setColor(new Color(0.0f,1.0f,0.0f));
		g.fillRect(25,50,100,20);
		g.drawString("Current RGB:"+g.getColor(),130,65);
		
		//set new drawing color using static color objects
		g.setColor(Color.blue);
		g.fillRect(25,75,100,20);
		g.drawString("Current RGB:"+g.getColor(),130,90);
		
		//display individual RGB values
		Color color = Color.magenta;
		g.setColor(color);
		g.fillRect(25,100,100,20);
		g.drawString("RBG values:"+color.getRed()+","+color.getGreen()+","+color.getBlue(),130,115);
		
	}
	
	//excute application
	public static void main(String args[])
	{
		ShowColors application =new ShowColors();
		application.setDefaultCloseOperation(
			JFrame.EXIT_ON_CLOSE);
	}
}
		
//end class ShowColors

[nihility88]

顶，再学习

[wawawa2222]

都是好东西啊...

[madee123]

收藏了

[zhaojiubo]

哇 跨年了 都！

[jinyi2011]

精华精华真的是很华啊