我必须在“准备编程Java 1.42”中的一个学校项目的小程序中创建一个TicTacToe游戏。在actionPerformed类中,我想简单地将左上方第一个正方形的文本设置/编辑为“ X”。我在JButton上使用了setActionCommand(),并在actionPerformed类中调用了getActionCommand()。但是,在我的if语句中,我使用getSource(),所以我可以引用对象本身并设置/编辑文本。我不能同时使用getActionCommand()和getSource()吗?谢谢。
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.applet.Applet;
import javax.swing.JButton;
public class TicTacToe extends Applet implements ActionListener
{
public void InitializeGame()
{
setLayout(null);
JButton Square1 = new JButton();
Square1.setBackground(Color.white);
Square1.setBounds(90,20,75,75);
Square1.addActionListener(this);
Square1.setActionCommand("s1");
JButton Square2 = new JButton();
Square2.setBackground(Color.white);
Square2.setBounds(165,20,75,75);
Square2.addActionListener(this);
Square2.setActionCommand("s2");
JButton Square3 = new JButton();
Square3.setBackground(Color.white);
Square3.setBounds(240,20,75,75);
Square3.addActionListener(this);
Square3.setActionCommand("s3");
JButton Square4 = new JButton();
Square4.setBackground(Color.white);
Square4.setBounds(90,95,75,75);
Square4.addActionListener(this);
Square4.setActionCommand("s4");
JButton Square5 = new JButton();
Square5.setBackground(Color.white);
Square5.setBounds(165,95,75,75);
Square5.addActionListener(this);
Square5.setActionCommand("s5");
JButton Square6 = new JButton();
Square6.setBackground(Color.white);
Square6.setBounds(240,95,75,75);
Square6.addActionListener(this);
Square6.setActionCommand("s6");
JButton Square7 = new JButton();
Square7.setBackground(Color.white);
Square7.setBounds(90,170,75,75);
Square7.addActionListener(this);
Square7.setActionCommand("s7");
JButton Square8 = new JButton();
Square8.setBackground(Color.white);
Square8.setBounds(165,170,75,75);
Square8.addActionListener(this);
Square8.setActionCommand("s8");
JButton Square9 = new JButton();
Square9.setBackground(Color.white);
Square9.setBounds(240,170,75,75);
Square9.addActionListener(this);
Square9.setActionCommand("s9");
add(Square1);
add(Square2);
add(Square3);
add(Square4);
add(Square5);
add(Square6);
add(Square7);
add(Square8);
add(Square9);
}
public void init()
{
resize (400,300);
setBackground(Color.orange);
JButton Play = new JButton("Click to Play");
Play.setBackground(Color.white);
Play.setForeground(Color.black);
Play.addActionListener(this);
add(Play);
}
public void actionPerformed(ActionEvent e)
{
removeAll();
setBackground(Color.pink);
InitializeGame();
if ( e.getActionCommand().equals( "s1" ) )
{
((JButton)e.getSource()).setText("X");
}
repaint();
}
}
我希望在左上方的JButton上看到“ X”。但是,文本在运行时不会出现。
答案 0 :(得分:0)
在actionPerformed()
方法内,您需要在removeAll()
块内进行setBackground()
,InitializeGame()
和if
调用,如下所示:
否则,每次单击任何按钮都会重置整个UI。 (因为您已经在所有按钮中添加了相同的ActionListener
。)
public void actionPerformed(ActionEvent e)
{
if (((JButton) e.getSource()).getText().equals("Click to Play")) {
removeAll();
setBackground(Color.pink);
InitializeGame();
}
if ( e.getActionCommand().equals( "s1" ) )
{
((JButton)e.getSource()).setText("X");
}
repaint();
}