Java 生成一次出现一个数字的随机数
我目前正在学习Java中的Swing，我正在尝试生成一个随机数，除非生成数字时，程序需要计算出它是多少个数字（1-10），然后暂停半秒，然后显示第一个数字暂停半秒显示第二个数字等 大致如下： 生成的数字为1256 1（1/2秒）2（1/2秒）5（1/2秒）6 以下是我目前的代码：Java 生成一次出现一个数字的随机数,java,swing,random,Java,Swing,Random,我目前正在学习Java中的Swing，我正在尝试生成一个随机数，除非生成数字时，程序需要计算出它是多少个数字（1-10），然后暂停半秒，然后显示第一个数字暂停半秒显示第二个数字等 大致如下： 生成的数字为1256 1（1/2秒）2（1/2秒）5（1/2秒）6 以下是我目前的代码： package test; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Font; import java.awt.Too
package test;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Properties;
import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.JButton;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JSeparator;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.SwingUtilities;
import javax.swing.border.BevelBorder;
public class RandomNumerGenerator implements ActionListener {
JFrame f;
JPanel p;
JTextField tNumber, tFrom, tTo;
JButton b, bSave;
private File configFile = new File("config.properties");
private Properties configProps;
private JPanel panel;
private JTextField tTitle;
private JMenuBar menuBar;
private JMenu mnConfiguration;
private JTextField tName;
String z;
private JCheckBoxMenuItem chckbxmntmEnableSpinButton;
private JLabel lColour;
private JRadioButton rRed;
private JRadioButton rBlue;
private JRadioButton rWhite;
private JRadioButton rYellow;
private JRadioButton rOrange;
private JRadioButton rPink;
private JRadioButton rPurple;
// -----------------------------Frame-------------------------
@SuppressWarnings("deprecation")
public RandomNumerGenerator() {
f = new JFrame("Random Number Generator Ver 1.1");
f.setTitle("Randomiser Ver 1.4");
f.setBackground(Color.BLACK);
f.setIconImage(Toolkit.getDefaultToolkit().getImage(RandomNumerGenerator.class.getResource("/test/Resources/owl_1.png")));
f.setResizable(false);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
p = new JPanel();
p.setAutoscrolls(true);
p.setBorder(new BevelBorder(BevelBorder.LOWERED, Color.WHITE,
Color.WHITE, Color.WHITE, Color.WHITE));
p.setBackground(Color.BLACK);
f.setExtendedState(JFrame.MAXIMIZED_BOTH);
f.setVisible(true);
f.setSize(5000, 5000);
f.show();
// -----------------------Generated number
// settings-------------------------------
tNumber = new JTextField(10);
tNumber.setBorder(null);
tNumber.setEditable(false);
tNumber.setHorizontalAlignment(SwingConstants.CENTER);
tNumber.setBackground(Color.BLACK);
tNumber.setForeground(Color.WHITE);
tNumber.setFont(new Font("Tahoma", Font.BOLD, 300));
f.getContentPane().add(p, BorderLayout.SOUTH);
panel = new JPanel();
panel.setBackground(Color.BLACK);
panel.setBorder(new BevelBorder(BevelBorder.RAISED, Color.WHITE,
Color.WHITE, Color.WHITE, Color.WHITE));
// ----------------------Title--------------------------------------------
tTitle = new JTextField("Randomiser");
tTitle.setEditable(false);
tTitle.setOpaque(false);
tTitle.setBorder(null);
tTitle.setHorizontalAlignment(SwingConstants.CENTER);
tTitle.setFont(new Font("Tahoma", Font.BOLD, 150));
tTitle.setForeground(Color.WHITE);
tTitle.setBackground(Color.BLACK);
panel.add(tTitle);
tTitle.setColumns(13);
// ----------------------------Buttons------------------------------------------
b = new JButton("Spin");
b.setForeground(Color.WHITE);
b.setFont(new Font("Tahoma", Font.BOLD, 150));
b.setBackground(Color.BLACK);
b.addActionListener(this);
GroupLayout gl_p = new GroupLayout(p);
gl_p.setHorizontalGroup(
gl_p.createParallelGroup(Alignment.LEADING)
.addGroup(gl_p.createSequentialGroup()
.addGap(7)
.addComponent(panel, GroupLayout.DEFAULT_SIZE, 1257, Short.MAX_VALUE)
.addGap(18))
.addGroup(gl_p.createSequentialGroup()
.addGap(7)
.addComponent(tNumber, GroupLayout.DEFAULT_SIZE, 1257, Short.MAX_VALUE)
.addGap(18))
.addGroup(gl_p.createSequentialGroup()
.addGap(454)
.addComponent(b, GroupLayout.DEFAULT_SIZE, 365, Short.MAX_VALUE)
.addGap(463))
);
gl_p.setVerticalGroup(
gl_p.createParallelGroup(Alignment.LEADING)
.addGroup(gl_p.createSequentialGroup()
.addGap(26)
.addComponent(panel, GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGap(8)
.addComponent(tNumber, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
.addGap(106)
.addComponent(b, GroupLayout.DEFAULT_SIZE, 191, Short.MAX_VALUE)
.addGap(87))
);
p.setLayout(gl_p);
// -------------------------------Menu------------------------
menuBar = new JMenuBar();
f.setJMenuBar(menuBar);
mnConfiguration = new JMenu("Configuration");
menuBar.add(mnConfiguration);
JLabel lblName = new JLabel("Name");
lblName.setBackground(Color.WHITE);
lblName.setFont(new Font("Tahoma", Font.BOLD, 11));
mnConfiguration.add(lblName);
// -------------------Title Options-------------------
tName = new JTextField();
mnConfiguration.add(tName);
tName.setColumns(4);
JLabel lblStartValue = new JLabel("Start Value");
lblStartValue.setBackground(Color.WHITE);
lblStartValue.setFont(new Font("Tahoma", Font.BOLD, 11));
mnConfiguration.add(lblStartValue);
// --------------------------------From Field------------------------
tFrom = new JTextField("1", 5);
mnConfiguration.add(tFrom);
JLabel lblEndValue = new JLabel("End Value");
lblEndValue.setBackground(Color.WHITE);
lblEndValue.setFont(new Font("Tahoma", Font.BOLD, 11));
mnConfiguration.add(lblEndValue);
// -----------------------To Field---------------------------
tTo = new JTextField("100", 5);
mnConfiguration.add(tTo);
lColour = new JLabel("Colour");
lColour.setBackground(Color.WHITE);
lColour.setFont(new Font("Tahoma", Font.BOLD, 11));
mnConfiguration.add(lColour);
JSeparator separator = new JSeparator();
mnConfiguration.add(separator);
//-------------Set Font Colour green--------
final JRadioButton rGreen = new JRadioButton("Green");
rGreen.setOpaque(false);
rGreen.setBackground(Color.WHITE);
rGreen.setFont(new Font("Tahoma", Font.BOLD, 11));
mnConfiguration.add(rGreen);
rGreen.addActionListener(this);
rGreen.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent ae){
if (rGreen.isSelected()){
tNumber.setForeground(Color.GREEN);
rRed.setEnabled(false);
rBlue.setEnabled(false);
rYellow.setEnabled(false);
rPink.setEnabled(false);
rPurple.setEnabled(false);
rWhite.setEnabled(false);
rOrange.setEnabled(false);
}else
{
tNumber.setForeground(Color.WHITE);
rRed.setEnabled(true);
rBlue.setEnabled(true);
rYellow.setEnabled(true);
rPink.setEnabled(true);
rPurple.setEnabled(true);
rWhite.setEnabled(true);
rOrange.setEnabled(true);
}
}
}
);
//-------------Set Font Colour Red--------
rRed = new JRadioButton("Red");
rRed.setFont(new Font("Tahoma", Font.BOLD, 11));
mnConfiguration.add(rRed);
rRed.addActionListener(this);
rRed.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent ae){
if (rRed.isSelected()){
tNumber.setForeground(Color.RED);
rGreen.setEnabled(false);
rBlue.setEnabled(false);
rYellow.setEnabled(false);
rPink.setEnabled(false);
rPurple.setEnabled(false);
rWhite.setEnabled(false);
rOrange.setEnabled(false);
}else
{
tNumber.setForeground(Color.WHITE);
rGreen.setEnabled(true);
rBlue.setEnabled(true);
rYellow.setEnabled(true);
rPink.setEnabled(true);
rPurple.setEnabled(true);
rWhite.setEnabled(true);
rOrange.setEnabled(true);
}
}
}
);
//-------------Set Font Colour Blue--------
rBlue = new JRadioButton("Blue");
rBlue.setFont(new Font("Tahoma", Font.BOLD, 11));
mnConfiguration.add(rBlue);
rBlue.addActionListener(this);
rBlue.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent ae){
if (rBlue.isSelected()){
tNumber.setForeground(Color.BLUE);
rGreen.setEnabled(false);
rRed.setEnabled(false);
rYellow.setEnabled(false);
rPink.setEnabled(false);
rPurple.setEnabled(false);
rWhite.setEnabled(false);
rOrange.setEnabled(false);
}else
{
tNumber.setForeground(Color.WHITE);
rGreen.setEnabled(true);
rRed.setEnabled(true);
rYellow.setEnabled(true);
rPink.setEnabled(true);
rPurple.setEnabled(true);
rWhite.setEnabled(true);
rOrange.setEnabled(true);
}
}
}
);
//-------------Set Font Colour Yellow--------
rYellow = new JRadioButton("Yellow");
rYellow.setFont(new Font("Tahoma", Font.BOLD, 11));
mnConfiguration.add(rYellow);
rYellow.addActionListener(this);
rYellow.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent ae){
if (rYellow.isSelected()){
tNumber.setForeground(Color.YELLOW);
rGreen.setEnabled(false);
rBlue.setEnabled(false);
rRed.setEnabled(false);
rPink.setEnabled(false);
rPurple.setEnabled(false);
rWhite.setEnabled(false);
rOrange.setEnabled(false);
}else
{
tNumber.setForeground(Color.WHITE);
rGreen.setEnabled(true);
rBlue.setEnabled(true);
rRed.setEnabled(true);
rPink.setEnabled(true);
rPurple.setEnabled(true);
rWhite.setEnabled(true);
rOrange.setEnabled(true);
}
}
}
);
//-------------Set Font Colour Orange--------
rOrange = new JRadioButton("Orange");
rOrange.setFont(new Font("Tahoma", Font.BOLD, 11));
mnConfiguration.add(rOrange);
rOrange.addActionListener(this);
rOrange.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent ae){
if (rOrange.isSelected()){
tNumber.setForeground(Color.ORANGE);
rGreen.setEnabled(false);
rBlue.setEnabled(false);
rYellow.setEnabled(false);
rPink.setEnabled(false);
rPurple.setEnabled(false);
rWhite.setEnabled(false);
rRed.setEnabled(false);
}else
{
tNumber.setForeground(Color.WHITE);
rGreen.setEnabled(true);
rBlue.setEnabled(true);
rYellow.setEnabled(true);
rPink.setEnabled(true);
rPurple.setEnabled(true);
rWhite.setEnabled(true);
rRed.setEnabled(true);
}
}
}
);
//-------------Set Font Colour Purple--------
rPurple = new JRadioButton("Purple");
rPurple.setFont(new Font("Tahoma", Font.BOLD, 11));
mnConfiguration.add(rPurple);
rPurple.addActionListener(this);
rPurple.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent ae){
if (rPurple.isSelected()){
tNumber.setForeground(Color.MAGENTA);
rGreen.setEnabled(false);
rBlue.setEnabled(false);
rYellow.setEnabled(false);
rPink.setEnabled(false);
rRed.setEnabled(false);
rWhite.setEnabled(false);
rOrange.setEnabled(false);
}else
{
tNumber.setForeground(Color.WHITE);
rGreen.setEnabled(true);
rBlue.setEnabled(true);
rYellow.setEnabled(true);
rPink.setEnabled(true);
rRed.setEnabled(true);
rWhite.setEnabled(true);
rOrange.setEnabled(true);
}
}
}
);
//-------------Set Font Colour Pink--------
rPink = new JRadioButton("Pink");
rPink.setFont(new Font("Tahoma", Font.BOLD, 11));
mnConfiguration.add(rPink);
rPink.addActionListener(this);
rPink.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent ae){
if (rPink.isSelected()){
tNumber.setForeground(Color.PINK);
rGreen.setEnabled(false);
rBlue.setEnabled(false);
rYellow.setEnabled(false);
rRed.setEnabled(false);
rPurple.setEnabled(false);
rWhite.setEnabled(false);
rOrange.setEnabled(false);
}else
{
tNumber.setForeground(Color.WHITE);
rGreen.setEnabled(true);
rBlue.setEnabled(true);
rYellow.setEnabled(true);
rRed.setEnabled(true);
rPurple.setEnabled(true);
rWhite.setEnabled(true);
rOrange.setEnabled(true);
}
}
}
);
//-------------Set Font Colour White--------
rWhite = new JRadioButton("White");
rWhite.setFont(new Font("Tahoma", Font.BOLD, 11));
mnConfiguration.add(rWhite);
rWhite.addActionListener(this);
rWhite.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent ae){
if (rWhite.isSelected()){
tNumber.setForeground(Color.WHITE);
rGreen.setEnabled(false);
rBlue.setEnabled(false);
rYellow.setEnabled(false);
rPink.setEnabled(false);
rPurple.setEnabled(false);
rRed.setEnabled(false);
rOrange.setEnabled(false);
}else
{
tNumber.setForeground(Color.WHITE);
rGreen.setEnabled(true);
rBlue.setEnabled(true);
rYellow.setEnabled(true);
rPink.setEnabled(true);
rPurple.setEnabled(true);
rRed.setEnabled(true);
rOrange.setEnabled(true);
}
}
}
);
// -------------------Save Count-----------
bSave = new JButton("Save");
bSave.setFont(new Font("Tahoma", Font.BOLD, 11));
bSave.setInheritsPopupMenu(true);
mnConfiguration.add(bSave);
bSave.addActionListener(this);
f.setVisible(true);
// ----------------Save Config------------------------------
bSave.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent arg0) {
try {
saveProperties();
JOptionPane.showMessageDialog(f,
"Properties were saved successfully!");
} catch (IOException ex) {
JOptionPane.showMessageDialog(f,
"Error saving properties file: " + ex.getMessage());
}
}
});
try {
loadProperties();
} catch (IOException ex) {
JOptionPane
.showMessageDialog(f,
"The config.properties file does not exist, default properties loaded.");
}
tName.setText(configProps.getProperty("Name"));
tFrom.setText(configProps.getProperty("Start"));
tTo.setText(configProps.getProperty("End"));
tTitle.setText(tName.getText());
;
// ----------Action on Button Pressed-------------------------
}
public void actionPerformed(ActionEvent e) {
if (e.getSource() == b) {
String s = tTo.getText();
String t = tFrom.getText();
try {
int x = Integer.parseInt(t);
int d = Integer.parseInt(s);
if (x >= d) {
JOptionPane.showMessageDialog(f, "START value is higher or Equal to END value, please enter a lower number...");
} else {
int newNumber = (int) (Math.random() * (d + 1 - x) + x);
tNumber.setText(newNumber + "");
}
} catch (NumberFormatException ee) {
JOptionPane.showMessageDialog(f, "You have entered an Invaild format please reconfigure...");
}
} else if (e.getSource() == bSave) {
tTitle.setText(tName.getText());
}
}
// -----------------------Saving-----------------------
private void saveProperties() throws IOException {
configProps.setProperty("Name", tName.getText());
configProps.setProperty("Start", tFrom.getText());
configProps.setProperty("End", tTo.getText());
OutputStream outputStream = new FileOutputStream(configFile);
configProps.store(outputStream, "host setttings");
outputStream.close();
}
// ------------------------Loading--------------
private void loadProperties() throws IOException {
Properties defaultProps = new Properties();
// sets default properties
defaultProps.setProperty("Name", "Randomiser");
defaultProps.setProperty("Start", "1");
defaultProps.setProperty("End", "100");
configProps = new Properties(defaultProps);
// loads properties from file
InputStream inputStream = new FileInputStream(configFile);
configProps.load(inputStream);
inputStream.close();
}
// -----------------Main Program------------------------
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new RandomNumerGenerator();
}
});
}
}
因此，每次按下旋转按钮时，它都会生成一个新的数字，但会依次显示每个图1。利用Swing
定时器在更新之间插入延迟
有关更多详细信息，请参阅
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Random;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class Test {
public static void main(String[] args) {
new Test();
}
public Test() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
private JLabel label;
private JTextField field;
private Timer timer;
private char[] values;
private int index;
private Random rnd;
public TestPane() {
rnd = new Random();
setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridwidth = GridBagConstraints.REMAINDER;
label = new JLabel("...");
field = new JTextField(10);
JButton btn = new JButton("Start");
add(label, gbc);
add(field, gbc);
add(btn, gbc);
timer = new Timer(1000, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
StringBuilder sb = new StringBuilder(field.getText());
sb.append(values[index]);
field.setText(sb.toString());
index++;
if (index >= values.length) {
((Timer)e.getSource()).stop();
}
}
});
timer.setInitialDelay(0);
btn.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if (timer.isRunning()) {
timer.stop();
}
field.setText("");
index = 0;
int number = rnd.nextInt(999);
String text = Integer.toString(number);
label.setText(text);
values = text.toCharArray();
timer.start();
}
});
}
}
}
使用Swing定时器，请参阅以了解更多详细信息。。你的问题是什么？顺便说一句，发布536行代码不是很有帮助。为了更快地获得更好的帮助，请发布一个（最小完整的可验证示例）或（简短、独立、正确的示例）。别担心，现在已经回答了。我只发布了所有代码，以便您可以复制和通过，并了解我的意思。谢谢您的快速回复，我现在正在阅读，同时尝试分析您的代码。我使用数学有关系吗？随机？祝你好运；）-试着把计时器想象成psudo循环