我很抱歉发布此内容，但我无法找到为什么我的JButtons数组不会显示在ButtonsPanel中。添加它们之后，我尝试在单独的类中使用我的代码来测试我的代码并且它工作了！但是为什么我的按钮不会出现在这个类中？
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
import javax.swing.border.LineBorder;
public class WordGui extends JFrame {
private JPanel contentPane;
private JTextField textField;
private JLabel lblNewLabel_1;
private JPanel buttonPanel;
private JTextArea txtrShuffleHistory;
private Word word ;
private boolean val;
private JButton btnGo;
private JButton button;
private JButton btnShuffleText;
private JPanel panel_1;
/**
* Launch the application.
*/
public static void main(String[] args) {
try {
com.jtattoo.plaf.noire.NoireLookAndFeel.setTheme("Small-Font","","05:Bageo,Dexter");
UIManager.setLookAndFeel("com.jtattoo.plaf.noire.NoireLookAndFeel");
} catch (Throwable e) {
e.printStackTrace();
}
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
WordGui frame = new WordGui();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public WordGui() {
setTitle("Word App Gui");
setResizable(false);
setBounds(new Rectangle(100, 100, 600, 200));
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 719, 394);
contentPane = new JPanel();
contentPane.setBounds(new Rectangle(100, 100, 600, 200));
contentPane.setSize(new Dimension(600, 250));
contentPane.setPreferredSize(new Dimension(600, 250));
contentPane.setBorder(new LineBorder(new Color(204, 0, 255), 5, true));
setContentPane(contentPane);
contentPane.setLayout(null);
JPanel panel = new JPanel();
panel.setBorder(new LineBorder(new Color(204, 0, 255), 3, true));
panel.setBounds(10, 11, 683, 45);
contentPane.add(panel);
panel_1 = new JPanel();
panel_1.setBorder(new LineBorder(new Color(204, 0, 255), 3, true));
panel_1.setBounds(140, 59, 553, 286);
contentPane.add(panel_1);
panel_1.setLayout(null);
JLabel lblNewLabel = new JLabel("Enter a new word here:");
lblNewLabel.setBounds(10, 11, 183, 14);
panel_1.add(lblNewLabel);
textField = new JTextField();
textField.setBounds(224, 8, 157, 20);
panel_1.add(textField);
textField.setColumns(10);
btnGo = new JButton("Go");
btnGo.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ev) {
if(ev.getSource()== btnGo){
assignWord(textField.getText());
}
}
});
btnGo.setBounds(391, 7, 57, 23);
panel_1.add(btnGo);
JLabel lblOriginalText = new JLabel("Original Text:");
lblOriginalText.setBounds(10, 36, 84, 14);
panel_1.add(lblOriginalText);
lblNewLabel_1 = new JLabel("New label");
lblNewLabel_1.setToolTipText("This is the original text entered\r\n");
lblNewLabel_1.setHorizontalTextPosition(SwingConstants.CENTER);
lblNewLabel_1.setHorizontalAlignment(SwingConstants.CENTER);
lblNewLabel_1.setBorder(new LineBorder(new Color(204, 0, 255), 3, true));
lblNewLabel_1.setBounds(90, 36, 358, 79);
panel_1.add(lblNewLabel_1);
JLabel lblShuffledText = new JLabel("Shuffled Text:");
lblShuffledText.setBounds(10, 126, 110, 14);
panel_1.add(lblShuffledText);
buttonPanel = new JPanel();
buttonPanel.setBorder(new LineBorder(new Color(204, 0, 255), 4, true));
buttonPanel.setBounds(10, 147, 533, 56);
panel_1.add(buttonPanel);
buttonPanel.setLayout(new GridLayout(1, 0, 0, 0));
btnShuffleText = new JButton("Shuffle Text");
btnShuffleText.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ev) {
if(ev.getSource() == btnShuffleText){
shuffle();
}
}
});
btnShuffleText.setBounds(90, 214, 196, 39);
panel_1.add(btnShuffleText);
button = new JButton("Reset");
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ev) {
if(ev.getSource() == button){
textField.setText("");
getGoBtn().setEnabled(true);
getShuffleBtn().setEnabled(false);
getButtonPanel().removeAll();
}
}
});
button.setBounds(294, 214, 196, 39);
panel_1.add(button);
JScrollPane scrollPane = new JScrollPane();
scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
scrollPane.setBounds(10, 59, 128, 258);
contentPane.add(scrollPane);
txtrShuffleHistory = new JTextArea();
txtrShuffleHistory.setToolTipText("View Shuffle History");
txtrShuffleHistory.setText("Shuffle History\r\n=================");
txtrShuffleHistory.setEditable(false);
scrollPane.setViewportView(txtrShuffleHistory);
JButton btnClear = new JButton("Clear");
btnClear.setBounds(10, 322, 126, 23);
contentPane.add(btnClear);
valid();
}
public void valid(){
JTextField field = new JTextField();
while(val == false){
int result = JOptionPane.showConfirmDialog(null,field, "Enter a Text?", JOptionPane.OK_CANCEL_OPTION);
if(result == JOptionPane.OK_OPTION){
String s = field.getText();
assignWord(s);
}
else if(result == JOptionPane.CANCEL_OPTION){
getResetBtn().setEnabled(false);
getShuffleBtn().setEnabled(false);
val = true;
}
}
}
public void assignWord(String s){
try{word = new Word(s);
val = true;
getTextLabel().setText("<html><body><font size = 30 >"+s+"</font></body></html>");
getTextArea().append("\nOriginal Word :"+s+"\n=================");
getGoBtn().setEnabled(false);
getResetBtn().setEnabled(true);
getShuffleBtn().setEnabled(true);
}
catch(RuntimeException e){JOptionPane.showMessageDialog(getParent(),e.getMessage()); val = false;}
}
public void shuffle(){
word.shuffle();
getButtonPanel().removeAll();
String temp = word.getShuffledText();
JButton[] buttons = new JButton[word.getText().length()];
for(int x = 0; x < word.getShuffledText().length(); x++){
buttons[x] = new JButton(""+temp.charAt(x));
getBody().add(buttons[x]);
buttons[x].setVisible(true);
}
getTextArea().append("\n"+word.getShuffledText());
}
public JLabel getTextLabel() {
return lblNewLabel_1;
}
public JPanel getButtonPanel() {
return buttonPanel;
}
public JTextArea getTextArea() {
return txtrShuffleHistory;
}
public JTextField getTextField() {
return textField;
}
public JButton getGoBtn() {
return btnGo;
}
public JButton getResetBtn() {
return button;
}
public JButton getShuffleBtn() {
return btnShuffleText;
}
public JPanel getBody() {
return panel_1;
}
}
我有添加JButton的shuffle方法，我很抱歉发布这个很长的代码，但是有人可以编译这个并找出按钮不显示的原因吗？我尝试更改面板布局但仍无法正常工作，
这是支持班级
import java.util.*;
public class Word {
private String text;
private List<Character> charList;
private String shuffled;
public Word(String str) {
if (str.length() < 3) {
throw new RuntimeException("Word must be more than 2 characters...");
}
if(invalid(str)) {
throw new RuntimeException("Word must not be composed of a single character...");
}
text = str.toUpperCase();
charList = getChars();
shuffle();
}
private boolean invalid(String s) {
int count = 1;
for (int i = 1; i < s.length(); i++) {
if (Character.toLowerCase(s.charAt(0)) == Character.toLowerCase(s.charAt(i)))
count++;
}
return (count == s.length());
}
private ArrayList<Character> getChars() {
ArrayList<Character> tempList = new ArrayList<Character>();
for (int i = 0; i < text.length(); i++) {
tempList.add(text.charAt(i));
}
return tempList;
}
public void shuffle() {
String orig = shuffled;
String tempShuffled;
do {
Collections.shuffle(charList);
tempShuffled = listToString();
} while (tempShuffled.equals(orig) || tempShuffled.equals(text));
shuffled = tempShuffled;
}
private String listToString() {
String strTemp = "";
for (Character ch: charList) {
strTemp += ch;
}
return strTemp;
}
public String toString() {
return text;
}
public String getShuffledText() {
return shuffled;
}
public String getText(){
return text;
}
}
答案 0 :(得分：3)
您正在为null JPanel使用绝对定位（panel_1布局）。 JButton数组buttons中的每个组件的默认大小均为0 x 0，因此不会显示。
Swing旨在使用layout manager，因此建议始终使用一个。
它消除了设置组件尺寸和位置的需要。使用一个panel_1，例如GridLayout。
同时调用
panel_1.revalidate();
panel_1.repaint();
添加数组中的所有按钮后。
除此之外：Java命名约定显示变量使用 camelCase ，例如panelOne而不是panel_1。
答案 1 :(得分：2)
panel_1.setLayout(null);
在这里，您基本上处于绝对定位状态，因此您需要为每个JButton设置大小和位置。使用setBounds