java中jfame的使用代码JMenubar.Jmenu.JmenuItem

package com.view; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Component; import java.awt.Container; import java.awt.Font; import java.awt.GridLayout; import java.awt.Insets; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JTextField; @SuppressWarnings("serial") public class MyFrame extends JFrame{ private Container c; private JMenuBar menuBar; private JMenu fileMenu; private Mb but1, but2, but3, but4, but5; private boolean[] butsNum = new boolean[5]; private JTextField lab; public MyFrame(){ c = this.getContentPane(); c.setLayout(new GridLayout(3, 2, 10, 10)); this.setSize(400, 300); this.setLocationRelativeTo(null); this.initMenuBar(); this.initButsNum(); this.initButs(); lab = new JTextField(1); lab.setFont(new Font("宋体", Font.PLAIN, 1)); lab.setBackground(new Color(238, 238, 238)); lab.setForeground(new Color(238, 238, 238)); lab.setBorder(null); c.add(lab); lab.addKeyListener(new KeyHandler()); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setVisible(true); } private void initButsNum(){ for(int i = 0; i < butsNum.length; i++){ butsNum[i] = true; } } private class KeyHandler implements KeyListener{ @Override public void keyTyped(KeyEvent e) { // TODO Auto-generated method stub } @Override public void keyPressed(KeyEvent e) { char ch = e.getKeyChar(); switch(ch){ case 'a':butsNum[0] = !butsNum[0]; break; case 'b':butsNum[1] = !butsNum[1]; break; case 'c':butsNum[2] = !butsNum[2]; break; case 'd':butsNum[3] = !butsNum[3]; break; case 'e':butsNum[4] = !butsNum[4]; break; } changeButs(); } @Override public void keyReleased(KeyEvent e) { if(e.getKeyChar() == 'f'){ System.out.println("x: " + c.getComponents()); } } } private void changeButs(){ // boolean flag = false; // for(int i = 0; i < butsNum.length; i++){ // if(butsNum[i]){ // flag = true; // break; // } // } but1.setVisible(butsNum[0]); but2.setVisible(butsNum[1]); but3.setVisible(butsNum[2]); but4.setVisible(butsNum[3]); but5.setVisible(butsNum[4]); // if(!flag){ // this.reset(); // } } private void reset(){ Component[] cs = c.getComponents(); for(int i = 0; i < cs.length; i++){ c.remove(cs[i]); } for(int i = 0; i < cs.length; i++){ System.out.println(cs[i].getClass().getName()); } } private void initMenuBar(){ menuBar = new JMenuBar(); this.setJMenuBar(menuBar); fileMenu = new JMenu("文件"); menuBar.add(fileMenu); } private void initButs(){ but1 = new Mb("a"); but1.setBackground(new Color(238, 238, 238)); but1.setForeground(new Color(238, 238, 238)); but1.setBorder(null); but1.setEnabled(false); but1.setText(""); but1.setBounds(0, 0, 100, 20); c.add(but1, BorderLayout.CENTER); but2 = new Mb("b"); c.add(but2, BorderLayout.SOUTH); but3 = new Mb("c"); c.add(but3, BorderLayout.NORTH); but4 = new Mb("d"); c.add(but4, BorderLayout.EAST); but5 = new Mb("e"); c.add(but5, BorderLayout.WEST); but1.addKeyListener(new KeyHandler()); but2.addKeyListener(new KeyHandler()); but3.addKeyListener(new KeyHandler()); but4.addKeyListener(new KeyHandler()); but5.addKeyListener(new KeyHandler()); } public static void main(String[] args) { new MyFrame(); } }