这是我的代码，我基本上只是为最常见的侦听器做了一个测试器，以后我可能会在以后的项目中使用它，主要的问题是在底部的键侦听器中，我试图重新显示框架，但我认为只是无法做到这一点，请帮助ps：不知道为什么进口不正确。

package newpackage;

import java.awt.Color;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.JSeparator;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.JTextArea;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;

public class NewClass1 extends JFrame {


private JLabel item1,infomouse,infoclicks,infoKeys,writehere;
private JButton button1,button2,button3;
private JTextArea text1,status,KeyStatus;
private JTextField text2,text3,mouse,clicks,test;
private JSeparator sep1;
private int clicknumber;

public NewClass1() {
    super("Listener Tests");
    setLayout(null);
    sep1 = new JSeparator();

    button1 = new JButton("Button1");
    button2 = new JButton("Button2");
    button3 = new JButton("Button3");
    item1 = new JLabel("Button Status :");
    infomouse = new JLabel("Mouse Status :");
    infoclicks = new JLabel("Nº of clicks :");
    infoKeys = new JLabel("Keyboard status:");
    writehere = new JLabel("Write here: ");


    text1 = new JTextArea();
    text2 = new JTextField(20);
    text3 = new JTextField(20);
    status = new JTextArea();
    mouse  = new JTextField(20);
    clicks = new JTextField(4);
    KeyStatus = new JTextArea();
    test = new JTextField(3);
    clicks.setText(String.valueOf(clicknumber));

    text1.setEditable(true);
    text2.setEditable(false);
    text3.setEditable(false);
    status.setEditable(false);
    mouse.setEditable(false);
    clicks.setEditable(false);
    KeyStatus.setEditable(false);

    text1.setBounds(135, 310, 150, 20);
    text2.setBounds(135, 330, 150, 20);
    text3.setBounds(135, 350, 150, 20);
    status.setBounds(15, 20, 240, 20);
    infomouse.setBounds(5,45,120,20);
    infoKeys.setBounds(5,90,120,20);
    KeyStatus.setBounds(15,115,240,85);
    test.setBounds(15,225,240,20);
    mouse.setBounds(15,70,100,20);
    infoclicks.setBounds(195, 45, 140, 20);
    clicks.setBounds(195, 70, 60, 20);

    item1.setBounds(5, 0, 120, 20);
    button1.setBounds(10, 310, 115, 20);
    button2.setBounds(10, 330, 115, 20);
    button3.setBounds(10, 350, 115, 20);
    sep1.setBounds(5, 305, 285, 10);

    sep1.setBackground(Color.BLACK);
    status.setBackground(Color.LIGHT_GRAY);

    button1.addActionListener(new button1list());
    button2.addActionListener(new button1list());
    button3.addActionListener(new button1list());

    button1.addMouseListener(new MouseList());
    button2.addMouseListener(new MouseList());
    button3.addMouseListener(new MouseList());
    getContentPane().addMouseListener(new MouseList());
    test.addKeyListener(new KeyList());
    this.addKeyListener(new KeyList());
    test.requestFocus();

    add(item1);
    add(button1);
    add(button2);
    add(button3);
    add(text1);
    add(text2);
    add(text3);
    add(status);
    add(infomouse);
    add(mouse);
    add(infoclicks);
    add(clicks);
    add(infoKeys);
    add(KeyStatus);
    add(test);
    add(sep1);

    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    try{
    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    }catch (Exception e){System.out.println("Error");}
    SwingUtilities.updateComponentTreeUI(this);
    setSize(300, 400);
    setResizable(false);
    setVisible(true);
    test.setFocusable(true);
    test.setFocusTraversalKeysEnabled(false);
    setLocationRelativeTo(null);
}

public class button1list implements ActionListener {

    public void actionPerformed(ActionEvent e) {
        String buttonpressed = e.getActionCommand();
        if (buttonpressed.equals("Button1")) {
            text1.setText("just");
        } else if (buttonpressed.equals("Button2")) {
            text2.setText(text2.getText()+"testing ");
        } else if (buttonpressed.equals("Button3")) {
            text3.setText("this");
        } 
    }
}
    public class MouseList implements MouseListener{
        public void mouseEntered(MouseEvent e){
        if(e.getSource()==button1){
                status.setText("button 1 hovered");
            }
        else if(e.getSource()==button2){
                status.setText("button 2 hovered");
            }
        else if(e.getSource()==button3){
                status.setText("button 3 hovered");
            }
        }
        public void mouseExited(MouseEvent e){
                status.setText("");
        }
        public void mouseReleased(MouseEvent e){
            if(!status.getText().equals("")){
                status.replaceRange("", 0, 22);
            }
        }
        public void mousePressed(MouseEvent e){
            if(e.getSource()==button1){
                status.setText("button 1 being pressed");
            }
        else if(e.getSource()==button2){
                status.setText("button 2 being pressed");
            }
        else if(e.getSource()==button3){
                status.setText("button 3 being pressed");

            }
        }
        public void mouseClicked(MouseEvent e){
            clicknumber++;
            mouse.setText("mouse working");
            clicks.setText(String.valueOf(clicknumber));
      }
 }
    public class KeyList implements KeyListener{
        public void keyReleased(KeyEvent e){}
        public void keyPressed(KeyEvent e){
            KeyStatus.setText("");
            test.setText("");
            String full = e.paramString();
            String [] temp = null;
            temp = full.split(",");
            for(int i=0; i<7 ;i++){
            KeyStatus.append(temp[i] + "\n");
            }
            if(e.getKeyChar()=='h'){setVisible(false);
                test.requestFocus();
            }
            if(e.getKeyChar()=='s'){setVisible(true);}
        }
        public void keyTyped(KeyEvent e){}
    }

}