Java SE Òì³£
package demo;
class TestA{
public int devide(int x,int y) throws ArithmeticException , DevideByMinusException{
if(y<0)
throw new DevideByMinusException("±»³ýÊýΪ¸º",y);
int result=x/y;
return result;
}
}
public class TestException {
/**
* @param args
*/
public static void main(String[] args) {
// TODO ×Ô¶¯Éú³É·½·¨´æ¸ù
try{
// int result=new TestA().devide(3,0);
int result=new TestA().devide(3,-1);
System.out.println(result);
}catch(ArithmeticException e){
System.out.println("in >>ArithmeticException<< ");
System.out.println(e.getMessage());
// e.printStackTrace();
}catch(DevideByMinusException e){
System.out.println("in >>DevideByMinusException<< ");
System.out.println(e.getMessage());
// e.printStackTrace();
}
System.out.println("program is running here,that is normal!");
}
}
class DevideByMinusException extends Exception{
int devisor;
public DevideByMinusException(String msg,int devisor){
super(msg);
this.devisor=devisor;
}
public int getDevisor(){
return devisor;
}
}
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/**
* ±£ÁôÁ½Î»Ð¡Êý
* @param d
* @return
*/
private static double remainTwoNumbers(double d){
java.math.BigDecimal f1 = new java.math.BigDecimal(d);//СÊýµãºó±£Áô2Î ......
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1¡¢StringÀàÊÇfinalµÄ£¬²»¿É±»¼Ì³Ð¡£public final class String¡£
2¡¢StringÀàÊǵı¾ÖÊÊÇ×Ö·ûÊý×échar[], ²¢ÇÒÆäÖµ²»¿É¸Ä±ä¡£private final char value[];
È»ºó´ò¿ªStr ......
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ÖµÀàÐÍÊÇÔʼÊý¾ÝÀàÐÍ °üÀ¨ int,byte,char short long,boolean,float,double
ÒýÓÃÀàÐ;ÍÊÇÒ»°ãµÄclassÀà µ±È»Ò²°üÀ¨ÔʼÊý¾ÝµÄ·â×°ÀàÐÍ ±ÈÈçintµÄ
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import java.io.*;
import java.net.*;
public class EchoServer {
private int port=8888;
private ServerSocket serverSocket;
public EchoServer() throws IOException {
serverSocket = new ServerSocket(port);
System.out.println("·þÎñÆ÷Æô¶¯");
......
1.servlet²úÉúÑéÖ¤Â룺
package com.servlet;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.Random;
import javax.imageio.ImageIO; ......