ava 父窗口如果new 了一个窗口,在关闭窗口时不能关闭调用者窗口,那么被调用的窗口就不要写关闭退出
public void mouseClicked(MouseEvent e) {
if(e.getClickCount()==2){
String num=((JLabel)e.getSource
this.add(jsp,"Center"); 这里必须设置成Center;不能用North,否则South不会显示
package com.qq.view;
import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
JLabel[] jlhead=new JLabel[50];
重点:
1,发送者发送的对象和接收者接收的对象是完全相同的类
2,传递的对象的类必须序列话 ,比如:class User implements Serializable
3,发送后关闭套接字防止Connection Reset错误,s.close()
import java.io.ObjectInputStream;
import java.net.ServerSocket;
imp
invalidClassException 类似无效的,比如强制转换时转错误或转换成不存在的类
g.drawImage(imgbg,0,0, this.getWidth(), this.getHeight(), this);
@Override
public void mouseEntered(MouseEvent e) {
Cursor mycursor=new Cursor(Cursor.HAND_CURSOR);
jlm1.setCursor(mycursor);
String check=lm.loginCheck(jtf1.getText().trim(), new String(jpf1.getPassword())).trim();