这不是一个完整的程序，但我想知道为什么当我按下"JButton"时它会冻结。我目前正在工作的骰子游戏，到目前为止，它进行得很好，但我不明白为什么它不会运行的时刻。谢谢你事先的帮助:)
p。在方法diceLogic中添加while循环后，问题开始出现。
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package dicegame_leonardasp;
/**
*
* @author LeoAsp
*/
import java.awt.Dimension;
import java.awt.Image;
import javax.swing.JLabel;
import javax.swing.ImageIcon;
import java.util.Random;
import javafx.scene.control.Cell;
public class DiceGameGui extends javax.swing.JFrame {
//Instansvariabel
//Skapa instans av Randomklassen
Random rand = new Random();
public DiceGameGui() {
initComponents();
}
public String doMessage() {
String message = "";
return message;
}
public String doReDice() {
String image = "";
int randNum = rand.nextInt(6 - 1) + 1;
if (randNum == 1) {
image = "one.gif";
} else if (randNum == 2) {
image = "two.gif";
} else if (randNum == 3) {
image = "three.gif";
} else if (randNum == 4) {
image = "four.gif";
} else if (randNum == 5) {
image = "five.gif";
} else if (randNum == 6) {
image = "six.gif";
} else {
dispose();
}
return image;
}
public void diceLogic(int players, int dice) {
jDiceResult.removeAll();
jDiceResult.setLayout(new java.awt.GridLayout(6, 5));
JLabel playersArray[][] = new JLabel[players][dice];
int j;
int i;
for (i = 0; i <= players; i++) {
for (j = 0; j < dice; j++) {
playersArray[i][j] = new JLabel();
playersArray[i][j].setIcon(new ImageIcon(doReDice()));
playersArray[i][j].setPreferredSize(new Dimension(60, 50));
// playersArray[i][j].setPreferredSize(new Dimension(20, 20));
//playersArray[i][j].setMinimumSize(new Dimension(20, 20));
//playersArray[i][j].setMaximumSize(new Dimension(20, 20));
jDiceResult.add(playersArray[i][j]);
jDiceResult.revalidate();
jDiceResult.repaint();
}
while (j <= 6) {
jDiceResult.add(javax.swing.Box.createGlue());
}
}
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@
SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
jBoxPlayers = new javax.swing.JComboBox();
jBoxDice = new javax.swing.JComboBox();
jBtnRoll = new javax.swing.JButton();
jScrollPane1 = new javax.swing.JScrollPane();
jTextArea1 = new javax.swing.JTextArea();
jButton1 = new javax.swing.JButton();
jDiceResult = new javax.swing.JPanel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jLabel1.setFont(new java.awt.Font("Menlo", 0, 18)); // NOI18N
jLabel1.setText("Players:");
jLabel2.setFont(new java.awt.Font("Menlo", 0, 18)); // NOI18N
jLabel2.setText("Dice:");
jLabel3.setFont(new java.awt.Font("Menlo", 0, 18)); // NOI18N
jBoxPlayers.setFont(new java.awt.Font("Menlo", 1, 14)); // NOI18N
jBoxPlayers.setModel(new javax.swing.DefaultComboBoxModel(new String[] {
"1", "2", "3", "4", "5"
}));
jBoxPlayers.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jBoxPlayersActionPerformed(evt);
}
});
jBoxDice.setFont(new java.awt.Font("Menlo", 1, 14)); // NOI18N
jBoxDice.setModel(new javax.swing.DefaultComboBoxModel(new String[] {
"1", "2", "3", "4", "5", "6"
}));
jBoxDice.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jBoxDiceActionPerformed(evt);
}
});
jBtnRoll.setFont(new java.awt.Font("Menlo", 0, 18)); // NOI18N
jBtnRoll.setText("Roll the Dice");
jBtnRoll.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jBtnRollActionPerformed(evt);
}
});
jTextArea1.setEditable(false);
jTextArea1.setColumns(20);
jTextArea1.setRows(5);
jScrollPane1.setViewportView(jTextArea1);
jButton1.setFont(new java.awt.Font("Menlo", 0, 14)); // NOI18N
jButton1.setText("Show Highscore");
jDiceResult.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED));
jDiceResult.setPreferredSize(new java.awt.Dimension(250, 300));
javax.swing.GroupLayout jDiceResultLayout = new javax.swing.GroupLayout(jDiceResult);
jDiceResult.setLayout(jDiceResultLayout);
jDiceResultLayout.setHorizontalGroup(
jDiceResultLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 246, Short.MAX_VALUE)
);
jDiceResultLayout.setVerticalGroup(
jDiceResultLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 296, Short.MAX_VALUE)
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 175, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(0, 0, Short.MAX_VALUE))
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
.addComponent(jBoxPlayers, 0, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGap(91, 91, 91)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jLabel2)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jLabel3))
.addComponent(jBoxDice, javax.swing.GroupLayout.PREFERRED_SIZE, 88, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jBtnRoll, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jDiceResult, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))))
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel1)
.addComponent(jLabel2)
.addComponent(jLabel3))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jBoxPlayers, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jBoxDice, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addComponent(jBtnRoll, javax.swing.GroupLayout.PREFERRED_SIZE, 57, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 347, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jDiceResult, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jButton1)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
pack();
} // </editor-fold>
private void jBoxPlayersActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void jBoxDiceActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void jBtnRollActionPerformed(java.awt.event.ActionEvent evt) {
int dice = Integer.parseInt(jBoxDice.getSelectedItem().toString());
int players = Integer.parseInt(jBoxPlayers.getSelectedItem().toString());
diceLogic(players, dice);
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info: javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(DiceGameGui.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(DiceGameGui.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(DiceGameGui.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(DiceGameGui.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new DiceGameGui().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JComboBox jBoxDice;
private javax.swing.JComboBox jBoxPlayers;
private javax.swing.JButton jBtnRoll;
private javax.swing.JButton jButton1;
private javax.swing.JPanel jDiceResult;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTextArea jTextArea1;
// End of variables declaration
}这就是问题所在:
while (j <= 6) {
jDiceResult.add(javax.swing.Box.createGlue());
}
在这一行中，您创建了一个无限循环，因为您检查了j<=6，但不更改j的值，因此j<=6始终是true。
我猜你想把while改成if。
我猜:
while (j <= 6) {
jDiceResult.add(javax.swing.Box.createGlue());
}
我想可能应该是:
if (j <= 6) {
jDiceResult.add(javax.swing.Box.createGlue());
}