程序界面无法显示-请各位指点一下

[ZSP95]

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;
import java.util.*;

public class CrapsGame extends JFrame
{
private JPanel pointDiceJPanel;
private TitledBorder pointDiceTitledBorder;

private JLabel pointDie1JLabel;
private JLabel pointDie2JLabel;
private JLabel die1JLabel;
private JLabel die2JLabel;

private JButton playJButton;
private JButton rollJButton;

private JLabel resultJLabel;
private JTextField resultJTextField;

private final int LUCKY_SEVEN = 7;
private final int YO_LEVEN = 11;

private final int SNAKE_EYES = 2;
private final int TREY = 3;
private final int BOX_CARS = 12;
private final int CRARS = 7;

private final String FILE_PREFIX = "Image/die";
private final String FILE_SUFFIX = ".gif";

private int myPoint = 0;
private Random randomObject ;//= new Random();

public void CrapsGame()
{
createUserInterface();
}
private void createUserInterface()
{
Container contentPane = getContentPane();//思维定势new getContainer();错误的方法getContainer()
contentPane.setLayout(null);

pointDiceJPanel = new JPanel();
pointDiceJPanel.setBounds(16,16,200,200);

pointDiceTitledBorder = new TitledBorder("point number");
//错的方法pointDiceTitledBorder.add(pointDiceJPanel);//pointDiceJPanel.add(pointDiceTitledBorder);
pointDiceJPanel.setBorder(pointDiceTitledBorder);
contentPane.add(pointDiceJPanel);

pointDie1JLabel = new JLabel();
pointDie1JLabel.setBounds(26,26,85,85);
pointDiceJPanel.add(pointDie1JLabel);

pointDie2JLabel = new JLabel();
pointDie2JLabel.setBounds(121,26,85,85);
pointDiceJPanel.add(pointDie2JLabel);

die1JLabel = new JLabel();
die1JLabel.setBounds(26,226,50,50);
contentPane.add(die1JLabel);
die2JLabel = new JLabel();
die2JLabel.setBounds(81,226,50,50);
contentPane.add(die2JLabel);

playJButton = new JButton("Play");
playJButton.setBounds(236,16,30,10);
contentPane.add(playJButton);
playJButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent evt)
{
playJButtonActionPerformed(evt);
}
});
rollJButton = new JButton("Roll");
rollJButton.setBounds(236,36,30,10);
contentPane.add(rollJButton);
rollJButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent evt)
{
rollJButtonActionPerformed(evt);
}
});
resultJLabel = new JLabel();
resultJLabel.setText("Result:");
resultJLabel.setBounds(236,56,30,10);
contentPane.add(resultJLabel);

resultJTextField = new JTextField();
resultJTextField.setBounds(236,66,30,30);
resultJTextField.setEnabled(false);
resultJLabel.setHorizontalAlignment(JLabel.RIGHT);
contentPane.add(resultJTextField);

setTitle("CrapsGAme");
setSize(450,300);
contentPane.setVisible(true);
}
public void playJButtonActionPerformed(ActionEvent evt)
{
// pointDie1JLabel.setIcon(null);
// pointDie2JLabel.setIcon(null);

pointDiceTitledBorder.setTitle("Point number");
pointDiceJPanel.repaint();

int sum_dice = rollDice();
switch(sum_dice)
{
case LUCKY_SEVEN:
case YO_LEVEN:
rollJButton.setEnabled(false);
resultJTextField.setText("You win");
break;
case SNAKE_EYES:
case TREY:
// case CRARS:
case BOX_CARS:
resultJTextField.setText("You lose");
playJButton.setEnabled(false);
rollJButton.setEnabled(true);
break;
default:
myPoint = sum_dice;
resultJTextField.setText("Please play again");

// displayDice(pointDie1JLabel,die1JLabel.getIcon());
// displayDice(pointDie2JLabel,die2JLabel.getIcon());
pointDie1JLabel.setIcon(die1JLabel.getIcon());
pointDie2JLabel.setIcon(die2JLabel.getIcon());
pointDiceTitledBorder.setTitle("Point number is"+sum_dice);
pointDiceJPanel.repaint();

playJButton.setEnabled(false);
rollJButton.setEnabled(true);
break;

}

}
private void rollJButtonActionPerformed(ActionEvent evt)
{
int sum_dice = rollDice();

if(sum_dice == myPoint)
{
resultJTextField.setText("You win");
rollJButton.setEnabled(false);
playJButton.setEnabled(true);
}
else if(sum_dice == CRARS)
{
resultJTextField.setText("You lose");
rollJButton.setEnabled(false);
playJButton.setEnabled(true);
}
}
private int rollDice()
{
Random randomObject = new Random();
int dice1 = 1+randomObject.nextInt(6);
int dice2 = 1+randomObject.nextInt(6);

displayDice(die1JLabel,dice1);
displayDice(die2JLabel,dice2);

return dice2+dice1;

}
private void displayDice(JLabel picDiceJLabel,int face)
{
ImageIcon image1 = new ImageIcon(FILE_PREFIX+face+FILE_SUFFIX);
picDiceJLabel.setIcon(image1);
}
public static void main(String[] args)
{
CrapsGame application = new CrapsGame();
application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

}

[zhuokai]

remove this:
contentPane.setLayout(null);

[哥就是传说]

楼上的错了, 修改

contentPane.setVisible(true);

为

this.setVisible(true);

因为第一个contentPane是一个JPanel 面板, 而不是框架.
要让框架显示直接setVisible(true);

这个方法是父类Component
的方法, 所有组件都有这个显示关闭的方法.

[ZSP95]

多谢了两位 辛苦