ÓÃJavaдµÄ¼ÆËãÆ÷
ÓÃJavaдµÄ¼ÆËãÆ÷
package com.wenbo.myprogrem.day15;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
public class Caculator implements ActionListener{
String result="0";
String oper="+";//ÔËËã·û
Double res;
StringBuilder sb=new StringBuilder();
JTextField jtf = new JTextField(10);
private boolean append=false;
public Caculator(){
JFrame jf = new JFrame("¼òÒ×¼ÆËãÆ÷");
JPanel jp = new JPanel();
jp.setLayout(new GridLayout(5,4));
String[] lab = {"Backs","CE","E","+","7","8","9",
"-","4","5","6","*","1","2","3",
"/","0","+/-",".","="};
for (int i=0; i <20; i++) {
JButton jb = new JButton(lab[i]);
jb.addActionListener(this);//¸øÿ¸ö°´Å¥×¢²á¼àÌýÆ÷
jp.add(jb);
}
jf.setResizable(false);
jf.add(jp);
jtf.addActionListener(this);
jf.add(jtf,BorderLayout.NORTH);
jf.setSize(320,240);//ÏñËØ
jf.setLocation(300,200);//ÉèÖóöÏÖλÖÃ
jf.setVisible(true);
jf.setDefaultCloseOperation(//ÉèÖÃX
JFrame.EXIT_ON_CLOSE);
}
public void actionPerformed(ActionEvent e) {
String comm=e.getActionCommand();//»ñµÃ°´Å¥ÉϵÄÎÄ×Ö
System.out.println(comm);
if("0123456789".indexOf(comm)!=-1){
if(append){//×·¼Ó£¬¸Õ¿ªÊ¼ÊÇfalse°´ÍêÊý×Ö¼
Ïà¹ØÎĵµ£º
ÏÈÀ´Á˽âÒ»ÏÂÁ´±íģʽµÄÔÀí£º
Ê×ÏÈдһ¸öJavaBean£¬ÄÚÈÝÊÇÒªÌí¼ÓµÄÔªËغ͸ÃÔªËصĽڵ㡣
public class NodeBean implements Serializable
{
private Object data; //ÔªËر¾Éí
private NodeBean next; //ÏÂÒ»¸ö½Úµã
&n ......
Ê×ÏÈ´ÓÒ»µÀÃæÊÔÌâĿ̸Æð:
package pkg1;
public class Jupiter
{
void method1(){
System.out.println("In Jupiter");
}
public void call(){
method1();
}
}
package pkg2;
import pkg1.Jupiter;
public class Minerva extends Jupiter{
public void method1(){
......
ÔÚÏÂÃæÕâ¸ö³ÌÐòÖÐString args[]Æðʲô×÷Óã¿ÎÒѧ¹ýC++£¬String args[]ÓëC++ÖеÄʲôÀàËÆ£¿Èç¹ûÊÇC++£¬ÏëÒªÊä³ö×Ö·û´®Ö»ÒªÔÚÏÂÃæдcout<<"...."<<endl;¾Í¿ÉÒÔÁË,void main()ÖеÄÀ¨ºÅΪ¿Õ£¬¶øjavaÖÐΪʲôҪдString args[]ÄØ£¿
class Example{
public static void main(String args[]){
System.out.printl ......
/*ÎÒ×öÁ˸ö³ÌÐò°ÑÐÂÀËÉϵÄÌìÆøÐÂÎÅ×¥¹ýÀ´´æµ½±¾µØ£¬¿¼ÂÇ·ÃÎÊËÙ¶ÈÎÊÌ⣬ÐÂÎÅÖеÄͼƬҲҪ±£´æµ½±¾µØ¡£
³ÌÐòÈçÏÂ
*/
package vnet.com.weather1;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java ......