好的..所以我有4个不同的J标签，我想在用户按下＆＃34; HELP＆＃34;按钮。我尝试过以下方法：
lblRuleNumberOne = new JLabel (" 1) Choose who plays first. ", SwingConstants.LEFT);
lblRuleNumberTwo = new JLabel (" 2) Each player in his turn drops one of his checkers down any of the slots in the top of the grid ", SwingConstants.LEFT);
lblRuleNumberThree = new JLabel (" 3) The play alternates until one of the players gets four checkers of his colour in a row ", SwingConstants.LEFT);
lblRuleNumberFour = new JLabel (" 4) The first player to get four in a row wins ", SwingConstants.LEFT);
但是当我运行代码时，这就是它打印的内容：
[ 1) Rule Number..... ]
[2) Rule Number...... ]
[3) Rules Number ........ ]
[ 4) Rule Number ..... ]
它应该都是这样的东西：
[1) Rule Number .......]
[2) Rule Number .......]
[3) Rule Number .......]
[4) Rule Number .......]
这是我的完整代码：
import java.awt.Color;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
public class connectFourDesign extends JPanel {
private static final long serialVersionUID = 1L;
// Welcome Screen
private JLabel lblWelcome;
// Buttons for Welcome Screen
private JButton playButton;
private JButton helpButton;
private JButton quitButton;
// Buttons for Playing Option
private JButton humanVsCom;
private JButton multiplayer;
private JButton withTimeLimit;
private JButton noTimeLimit;
// Go Back Button
private JButton goBack;
private JLabel lblInstructions;
private JLabel lblRuleNumberOne;
private JLabel lblRuleNumberTwo;
private JLabel lblRuleNumberThree;
private JLabel lblRuleNumberFour;
public connectFourDesign () {
setBackground(Color.black);
lblWelcome = new JLabel (" Connect 4 ", SwingConstants.CENTER);
lblWelcome.setFont(new Font("Astron Boy Rg", Font.ITALIC, 110));
lblWelcome.setForeground(Color.white);
add(lblWelcome);
lblWelcome.setVisible(true);
lblInstructions = new JLabel (" Instruction ", SwingConstants.CENTER);
lblInstructions.setFont(new Font("Astron Boy Rg", Font.ITALIC, 50));
lblInstructions.setForeground(Color.red);
add(lblInstructions);
lblInstructions.setVisible(false);
lblRuleNumberOne = new JLabel (" 1) Choose who plays first. ".trim(), SwingConstants.LEFT);
lblRuleNumberTwo = new JLabel (" 2) Each player in his turn drops one of his checkers down any of the slots in the top of the grid ".trim(), SwingConstants.LEFT);
lblRuleNumberThree = new JLabel (" 3) The play alternates until one of the players gets four checkers of his colour in a row ".trim(), SwingConstants.LEFT);
lblRuleNumberFour = new JLabel (" 4) The first player to get four in a row wins ".trim(), SwingConstants.LEFT);
lblRuleNumberOne.setFont(new Font("Astron Boy Rg", Font.ITALIC, 30));
lblRuleNumberOne.setForeground(Color.white);
add(lblRuleNumberOne);
lblRuleNumberOne.setVisible(false);
lblRuleNumberTwo.setFont(new Font("Astron Boy Rg", Font.ITALIC, 22));
lblRuleNumberTwo.setForeground(Color.white);
add(lblRuleNumberTwo);
lblRuleNumberTwo.setVisible(false);
lblRuleNumberThree.setFont(new Font("Astron Boy Rg", Font.ITALIC, 22));
lblRuleNumberThree.setForeground(Color.white);
add(lblRuleNumberThree);
lblRuleNumberThree.setVisible(false);
lblRuleNumberFour.setFont(new Font("Astron Boy Rg", Font.ITALIC, 22));
lblRuleNumberFour.setForeground(Color.white);
add(lblRuleNumberFour);
lblRuleNumberFour.setVisible(false);
playButton = new JButton (" Play ");
playButton.setFont(new Font("Astron Boy Rg", Font.ITALIC, 98));
playButton.setBackground(Color.black);
playButton.setForeground(Color.GREEN);
add(playButton);
playButton.setVisible(true);
playButton.addActionListener(new playButtonListener());
helpButton = new JButton ( " Help ");
helpButton.setFont(new Font("Astron Boy Rg", Font.ITALIC, 98));
helpButton.setBackground(Color.black);
helpButton.setForeground(Color.magenta);
add(helpButton);
helpButton.setVisible(true);
helpButton.addActionListener(new helpButtonListener());
quitButton = new JButton ( " Quit ");
quitButton.setFont(new Font("Astron Boy Rg", Font.ITALIC, 98));
quitButton.setBackground(Color.black);
quitButton.setForeground(Color.orange);
add(quitButton);
quitButton.setVisible(true);
quitButton.addActionListener(new CloseListener());
humanVsCom = new JButton ( " Human vs Computer ");
humanVsCom.setFont(new Font("Astron Boy Rg", Font.ITALIC, 50));
humanVsCom.setBackground(Color.black);
humanVsCom.setForeground(Color.magenta);
add(humanVsCom);
humanVsCom.setVisible(false);
humanVsCom.addActionListener(new humanVsComputerButtonListener());
multiplayer = new JButton ( " Multiplayer ");
multiplayer.setFont(new Font("Astron Boy Rg", Font.ITALIC, 50));
multiplayer.setBackground(Color.black);
multiplayer.setForeground(Color.orange);
add(multiplayer);
multiplayer.setVisible(false);
multiplayer.addActionListener(new multiplayerButtonListener());
withTimeLimit = new JButton ( " with Time ");
withTimeLimit.setFont(new Font("Astron Boy Rg", Font.ITALIC, 50));
withTimeLimit.setBackground(Color.black);
withTimeLimit.setForeground(Color.magenta);
add(withTimeLimit);
withTimeLimit.setVisible(false);
withTimeLimit.addActionListener(new withTimeLimitButtonListener());
noTimeLimit = new JButton ( " without Time ");
noTimeLimit.setFont(new Font("Astron Boy Rg", Font.ITALIC, 50));
noTimeLimit.setBackground(Color.black);
noTimeLimit.setForeground(Color.orange);
add(noTimeLimit);
noTimeLimit.setVisible(false);
noTimeLimit.addActionListener(new noTimeLimitButtonListener());
goBack = new JButton ( " Go Back ");
goBack.setFont(new Font("Astron Boy Rg", Font.ITALIC, 50));
goBack.setBackground(Color.black);
goBack.setForeground(Color.BLUE);
add(goBack);
goBack.setVisible(false);
goBack.addActionListener(new goBackButtonListener());
}
private class playButtonListener implements ActionListener {
public void actionPerformed(ActionEvent event) {
if (event.getSource() == playButton) {
lblWelcome.setVisible(true);
playButton.setVisible(false);
helpButton.setVisible(false);
quitButton.setVisible(false);
humanVsCom.setVisible(true);
multiplayer.setVisible(true);
withTimeLimit.setVisible(true);
noTimeLimit.setVisible(true);
goBack.setVisible(true);
}
}
}
private class goBackButtonListener implements ActionListener {
public void actionPerformed(ActionEvent event) {
if (event.getSource() == goBack) {
lblWelcome.setVisible(true);
playButton.setVisible(true);
helpButton.setVisible(true);
quitButton.setVisible(true);
humanVsCom.setVisible(false);
multiplayer.setVisible(false);
withTimeLimit.setVisible(false);
noTimeLimit.setVisible(false);
lblInstructions.setVisible(false);
lblRuleNumberOne.setVisible(false);
lblRuleNumberTwo.setVisible(false);
lblRuleNumberThree.setVisible(false);
lblRuleNumberFour.setVisible(false);
goBack.setVisible(false);
}
}
}
private class CloseListener implements ActionListener{
public void actionPerformed(ActionEvent event) {
if (event.getSource() == quitButton) {
System.exit(0);
}
}
}
private class humanVsComputerButtonListener implements ActionListener {
public void actionPerformed(ActionEvent event) {
if (event.getSource() == humanVsCom) {
lblWelcome.setVisible(true);
playButton.setVisible(false);
helpButton.setVisible(false);
quitButton.setVisible(false);
humanVsCom.setVisible(true);
multiplayer.setVisible(false);
withTimeLimit.setVisible(false);
noTimeLimit.setVisible(false);
goBack.setVisible(false);
Thread thread =new Thread() {
public void run() {
humanVsCom.setText(" Game Starts In ");
try {
Thread.sleep(1000);
}catch (Exception e) {
}
humanVsCom.setText("3");
try {
Thread.sleep(1000);
}catch (Exception e) {
}
humanVsCom.setText("2");
try {
Thread.sleep(1000);
}catch (Exception e) {
}
humanVsCom.setText("1");
try {
Thread.sleep(1000);
}catch (Exception e) {
}
humanVsCom.setVisible(false);
}
};
thread.start();
}
}
}
private class multiplayerButtonListener implements ActionListener {
public void actionPerformed(ActionEvent event) {
if (event.getSource() == multiplayer) {
lblWelcome.setVisible(true);
playButton.setVisible(false);
helpButton.setVisible(false);
quitButton.setVisible(false);
humanVsCom.setVisible(false);
multiplayer.setVisible(true);
withTimeLimit.setVisible(false);
noTimeLimit.setVisible(false);
goBack.setVisible(false);
Thread thread =new Thread() {
public void run() {
multiplayer.setText(" Game Starts In ");
try {
Thread.sleep(1000);
}catch (Exception e) {
}
multiplayer.setText("3");
try {
Thread.sleep(1000);
}catch (Exception e) {
}
multiplayer.setText("2");
try {
Thread.sleep(1000);
}catch (Exception e) {
}
multiplayer.setText("1");
try {
Thread.sleep(1000);
}catch (Exception e) {
}
multiplayer.setVisible(false);
}
};
thread.start();
}
}
}
private class withTimeLimitButtonListener implements ActionListener {
public void actionPerformed(ActionEvent event) {
if (event.getSource() == withTimeLimit) {
lblWelcome.setVisible(true);
playButton.setVisible(false);
helpButton.setVisible(false);
quitButton.setVisible(false);
humanVsCom.setVisible(false);
multiplayer.setVisible(false);
withTimeLimit.setVisible(true);
noTimeLimit.setVisible(false);
goBack.setVisible(false);
Thread thread =new Thread() {
public void run() {
withTimeLimit.setText(" Game Starts In ");
try {
Thread.sleep(1000);
}catch (Exception e) {
}
withTimeLimit.setText("3");
try {
Thread.sleep(1000);
}catch (Exception e) {
}
withTimeLimit.setText("2");
try {
Thread.sleep(1000);
}catch (Exception e) {
}
withTimeLimit.setText("1");
try {
Thread.sleep(1000);
}catch (Exception e) {
}
withTimeLimit.setVisible(false);
}
};
thread.start();
}
}
}
private class noTimeLimitButtonListener implements ActionListener {
public void actionPerformed(ActionEvent event) {
if (event.getSource() == noTimeLimit) {
lblWelcome.setVisible(true);
playButton.setVisible(false);
helpButton.setVisible(false);
quitButton.setVisible(false);
humanVsCom.setVisible(false);
multiplayer.setVisible(false);
withTimeLimit.setVisible(false);
noTimeLimit.setVisible(true);
goBack.setVisible(false);
Thread thread =new Thread() {
public void run() {
noTimeLimit.setText(" Game Starts In ");
try {
Thread.sleep(1000);
}catch (Exception e) {
}
noTimeLimit.setText("3");
try {
Thread.sleep(1000);
}catch (Exception e) {
}
noTimeLimit.setText("2");
try {
Thread.sleep(1000);
}catch (Exception e) {
}
noTimeLimit.setText("1");
try {
Thread.sleep(1000);
}catch (Exception e) {
}
noTimeLimit.setVisible(false);
}
};
thread.start();
}
}
}
private class helpButtonListener implements ActionListener {
public void actionPerformed(ActionEvent event) {
if (event.getSource() == helpButton) {
lblWelcome.setVisible(true);
playButton.setVisible(false);
helpButton.setVisible(false);
quitButton.setVisible(false);
humanVsCom.setVisible(false);
multiplayer.setVisible(false);
withTimeLimit.setVisible(false);
noTimeLimit.setVisible(false);
lblInstructions.setVisible(true);
lblRuleNumberOne.setVisible(true);
lblRuleNumberTwo.setVisible(true);
lblRuleNumberThree.setVisible(true);
lblRuleNumberFour.setVisible(true);
goBack.setVisible(true);
}
}
}
}
答案 0 :(得分：-1)
您是否尝试在字符串上使用.trim()，这会从字符串的两端删除空格？
所以，例如：
lblRuleNumberOne = new JLabel (" 1) Choose who plays first. ".trim(), SwingConstants.LEFT);
答案 1 :(得分：-1)
您始终可以创建一个JLabel数组，以便能够迭代。然后，您可以为特定标签指定特定值。
private JLabel[] labels;
labels = new JLabel[4];
labels[3] = new JLabel("Rule 4 here");
如果您对修复字符串格式感兴趣，请在熟悉HTML的情况下查看StringBuilder。
答案 2 :(得分：-1)
使用其他LayoutManager。您正在使用默认布局管理器，它是一个尝试将所有子项水平放置的FlowLayout，当没有足够的空间时，它将换行到下一行。