Java正在移动标签?
我做了一个计算器,一旦我得到答案,我希望标签Java正在移动标签?,java,swing,animation,jlabel,Java,Swing,Animation,Jlabel,我做了一个计算器,一旦我得到答案,我希望标签l4在屏幕上不断移动。谁能告诉我怎么移动它,因为我想不出来 import java.awt.*; import java.awt.event.*; import java.awt.Label; import java.awt.Font; import javax.swing.*; class DanielCalculator implements ActionListener { Timer t = new Timer(5, this); int
l4
在屏幕上不断移动。谁能告诉我怎么移动它,因为我想不出来
import java.awt.*;
import java.awt.event.*;
import java.awt.Label;
import java.awt.Font;
import javax.swing.*;
class DanielCalculator implements ActionListener {
Timer t = new Timer(5, this);
int x = 300;
int y = 50;
DanielCalculatorFrame f = new DanielCalculatorFrame();
Label l1 = new Label("First Number");
Label l2 = new Label("Second Number");
Label l3 = new Label("Result: ");
TextField t1 = new TextField();
TextField t2 = new TextField();
Label l4 = new Label("0");
Button b1 = new Button("Add");
Button b2 = new Button("Subtract");
Button b3 = new Button("Multiply");
Button b4 = new Button("Divide");
DanielCalculator()
{
l1.setBounds(20, 70, 100, 20);
l2.setBounds(240, 70, 100, 20);
l3.setBounds(70, 168, 100, 50);
t1.setBounds(120, 70, 100, 20);
t2.setBounds(360, 70, 100, 20);
b1.setBounds(230, 130, 50, 20); //3
b2.setBounds(330, 130, 50, 20); //4
b3.setBounds(30, 130, 50, 20); //1
b4.setBounds(130, 130, 50, 20); //2
f.add(l1);
f.add(l2);
f.add(l3);
f.add(t1);
f.add(t2);
f.add(l4);
f.add(b1);
f.add(b2);
f.add(b3);
f.add(b4);
b1.addActionListener(this);
b2.addActionListener(this);
b3.addActionListener(this);
b4.addActionListener(this);
f.setLayout(null);
f.setVisible(true);
f.setSize(600,450);
Font myFont = new Font("Serif",Font.BOLD,26);
l4.setFont(myFont);
l3.setFont(myFont);
l4.setBounds(200, 170, x, y);
}
public void actionPerformed(ActionEvent e)
{
double continuee;
Double n1=Double.parseDouble(t1.getText());
Double n2=Double.parseDouble(t2.getText());
if(e.getSource() == b1) {
l4.setText(String.valueOf(n1+n2));\
}
if(e.getSource() == b2) {
l4.setText(String.valueOf(n1-n2));
}
if(e.getSource() == b3) {
l4.setText(String.valueOf(n1*n2));
}
if(e.getSource() == b4) {
l4.setText(String.valueOf(n1/n2));
}
}
public static void main (String[] args) {
new DanielCalculator();
}
}
最简单的解决方案可能是使用框架的玻璃窗格,因为它允许您独立于主视图控制布局 说到布局…这就是为什么你应该避免
null
layouts
此示例使用框架的玻璃窗格功能提供动画层,该层将显示在主UI上方
ResultsPane
确实使用了null
布局,这是您提供此类功能的唯一方式,但它所做的是确保尊重组件的首选大小,允许字体、字体度量和其他渲染差异的差异,这些差异可能会影响其他平台上的大小
“基本计算”窗格使用复合布局方法,其中字段和按钮的布局相互独立
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.NumberFormat;
import javax.swing.AbstractAction;
import static javax.swing.Action.NAME;
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 TestCalculator {
public static void main(String[] args) {
new TestCalculator();
}
public TestCalculator() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
ResultPane resultPane = new ResultPane();
JFrame frame = new JFrame("Testing");
frame.setGlassPane(resultPane);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new CalculatorPane(resultPane));
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class ResultPane extends JPanel {
private JLabel result;
private Timer timer;
private int xDelta = (Math.random() > 0.5) ? 1 : -1;
private int yDelta = (Math.random() > 0.5) ? 1 : -1;
;
public ResultPane() {
setOpaque(false);
setLayout(null);
result = new JLabel();
Font font = result.getFont();
font = font.deriveFont(Font.BOLD, 26f);
result.setFont(font);
add(result);
timer = new Timer(40, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
Point point = result.getLocation();
point.x += xDelta;
point.y += yDelta;
if (point.x < 0) {
point.x = 0;
xDelta *= -1;
} else if (point.x + result.getWidth() > getWidth()) {
point.x = getWidth() - result.getWidth();
xDelta *= -1;
}
if (point.y < 0) {
point.y = 0;
yDelta *= -1;
} else if (point.y + result.getHeight() > getHeight()) {
point.y = getHeight() - result.getHeight();
yDelta *= -1;
}
result.setLocation(point);
repaint();
}
});
timer.start();
}
public void setResult(Number number) {
result.setText("Result: " + NumberFormat.getNumberInstance().format(number));
result.setSize(result.getPreferredSize());
setVisible(true);
}
}
public class CalculatorPane extends JPanel {
private final ResultPane resultPane;
private final JLabel firstNumberLabel = new JLabel("First Number:");
private final JLabel secondNumberLabel = new JLabel("Second Number:");
private final JTextField firstNumberField = new JTextField(5);
private final JTextField secondNumberField = new JTextField(5);
public CalculatorPane(ResultPane resultPane) {
setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridwidth = GridBagConstraints.REMAINDER;
this.resultPane = resultPane;
JPanel fields = new JPanel();
fields.add(firstNumberLabel);
fields.add(firstNumberField);
fields.add(secondNumberLabel);
fields.add(secondNumberField);
add(fields, gbc);
JPanel buttons = new JPanel();
buttons.add(new JButton(new AddAction()));
buttons.add(new JButton(new SubtractAction()));
buttons.add(new JButton(new MultiplyAction()));
buttons.add(new JButton(new DivideAction()));
add(buttons, gbc);
}
public class AddAction extends AbstractAction {
public AddAction() {
putValue(NAME, "+");
}
@Override
public void actionPerformed(ActionEvent e) {
try {
double num1 = Double.parseDouble(firstNumberField.getText());
double num2 = Double.parseDouble(secondNumberField.getText());
double result = num1 + num2;
resultPane.setResult(result);
} catch (NumberFormatException exp) {
}
}
}
public class SubtractAction extends AbstractAction {
public SubtractAction() {
putValue(NAME, "-");
}
@Override
public void actionPerformed(ActionEvent e) {
try {
double num1 = Double.parseDouble(firstNumberField.getText());
double num2 = Double.parseDouble(secondNumberField.getText());
double result = num1 - num2;
resultPane.setResult(result);
} catch (NumberFormatException exp) {
}
}
}
public class MultiplyAction extends AbstractAction {
public MultiplyAction() {
putValue(NAME, "x");
}
@Override
public void actionPerformed(ActionEvent e) {
try {
double num1 = Double.parseDouble(firstNumberField.getText());
double num2 = Double.parseDouble(secondNumberField.getText());
double result = num1 * num2;
resultPane.setResult(result);
} catch (NumberFormatException exp) {
}
}
}
public class DivideAction extends AbstractAction {
public DivideAction() {
putValue(NAME, "/");
}
@Override
public void actionPerformed(ActionEvent e) {
try {
double num1 = Double.parseDouble(firstNumberField.getText());
double num2 = Double.parseDouble(secondNumberField.getText());
double result = num1 / num2;
resultPane.setResult(result);
} catch (NumberFormatException exp) {
}
}
}
}
}
导入java.awt.BorderLayout;
导入java.awt.EventQueue;
导入java.awt.Font;
导入java.awt.GridBagConstraints;
导入java.awt.GridBagLayout;
导入java.awt.Point;
导入java.awt.event.ActionEvent;
导入java.awt.event.ActionListener;
导入java.text.NumberFormat;
导入javax.swing.AbstractAction;
导入静态javax.swing.Action.NAME;
导入javax.swing.JButton;
导入javax.swing.JFrame;
导入javax.swing.JLabel;
导入javax.swing.JPanel;
导入javax.swing.JTextField;
导入javax.swing.Timer;
导入javax.swing.UIManager;
导入javax.swing.UnsupportedLookAndFeelException;
公共类测试计算器{
公共静态void main(字符串[]args){
新的TestCalculator();
}
公共测试计算器(){
invokeLater(新的Runnable(){
@凌驾
公开募捐{
试一试{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}catch(ClassNotFoundException |实例化Exception | IllegalacessException |不支持ookandfeelException ex){
}
ResultPane ResultPane=新的ResultPane();
JFrame=新JFrame(“测试”);
框。设置玻璃窗格(结果窗格);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(新的BorderLayout());
添加(新计算器平面(结果平面));
frame.pack();
frame.setLocationRelativeTo(空);
frame.setVisible(true);
}
});
}
公共类ResultPane扩展了JPanel{
私有JLabel结果;
私人定时器;
private int xDelta=(Math.random()>0.5)?1:-1;
private int yDelta=(Math.random()>0.5)?1:-1;
;
公共结果页(){
设置不透明(假);
setLayout(空);
结果=新的JLabel();
Font=result.getFont();
font=font.deriveFont(font.BOLD,26f);
result.setFont(字体);
添加(结果);
计时器=新计时器(40,新ActionListener(){
@凌驾
已执行的公共无效操作(操作事件e){
Point=result.getLocation();
点x+=xDelta;
点y+=yDelta;
如果(x点<0){
点x=0;
xDelta*=-1;
}else if(point.x+result.getWidth()>getWidth()){
point.x=getWidth()-result.getWidth();
xDelta*=-1;
}
如果(点y<0){
点y=0;
yDelta*=-1;
}else if(point.y+result.getHeight()>getHeight()){
point.y=getHeight()-result.getHeight();
yDelta*=-1;
}
结果:设置位置(点);
重新油漆();
}
});
timer.start();
}
公共无效设置结果(编号){
result.setText(“结果:+NumberFormat.getNumberInstance().format(number));
result.setSize(result.getPreferredSize());
setVisible(真);
}
}
公共类计算器扩展JPanel{
私人最终结果页结果页;
私有最终JLabel firstNumberLabel=新JLabel(“第一个编号”);
专用最终JLabel secondNumberLabel=新JLabel(“第二个号码:”);
私有最终JTextField firstNumberField=新JTextField(5);
私有最终JTextField secondNumberField=新JTextField(5);
公共计算器面板(结果面板结果面板){
setLayout(新的GridBagLayout());
GridBagConstraints gbc=新的GridBagConstraints();
gbc.gridwidth=GridBagConstraints.rements;
this.resultPane=resultPane;
JPanel字段=新的JPanel();
字段。添加(firstNumberLabel);
字段。添加(firstNumberField);
字段。添加(第二个数字标签);
字段。添加(secondNumberField);
添加(字段,gbc);
JPanel按钮=新的JPanel();
add(newjbutton(newaddaction());
add(newjbutton(newsubtractAction());
添加(新的JButton(新的MultiplyAction());
add(newjbutton(newdivideaction());
添加(按钮,gbc);
}
公共类AddAction扩展了AbstractAction{
公共行动(){
putValue(名称“+”);
}
@凌驾
已执行的公共无效操作(操作事件e){
试一试{
双num1
public class J42JLabel_01 extends JLabel {
private static final long serialVersionUID = -42L;
private JWindow jWindow = null;
private Timer timer = null;
public J42JLabel_01(final String string) {
super(string);
setOpaque(true);
}
public void moveIt(final JFrame jFrame) {
if (jWindow == null) {
jFrame.getContentPane().remove(this);
Toolkit.getDefaultToolkit().beep();
jWindow = new JWindow(jFrame) {
@Override
public void dispose() {
Toolkit.getDefaultToolkit().beep();
timer.cancel();
super.dispose();
}
};
jWindow.setAlwaysOnTop(true);
jWindow.getContentPane().setLayout(new FlowLayout());
jWindow.getContentPane().add(this);
jWindow.pack();
jWindow.setVisible(true);
timer = new Timer(true);
timer.scheduleAtFixedRate(new TimerTask() {
public void run() {
jWindow.setLocation(jWindow.getLocation().x + 25, jWindow.getLocation().y + 24);
if (jWindow.getLocation().x > Toolkit.getDefaultToolkit().getScreenSize().width / 2) {
jWindow.setLocation(0, 0);
}
if (jWindow.getLocation().y > Toolkit.getDefaultToolkit().getScreenSize().height / 2) {
jWindow.setLocation(0, 0);
}
}
}, 0, 500);
}
else {
jFrame.getContentPane().add(this);
jWindow.dispose();
jWindow = null;
}
}
}
J42JLabel_01 instructionalExample = new J42JLabel_01(" TEST TESTING TEST ");
final JFrame jFrame = new JFrame();
jFrame.getContentPane().add(new JButton("Click") {
{
jFrame.getContentPane().add(this);
addActionListener(new ActionListener() {
public void actionPerformed(final ActionEvent e) {
instructionalExample.moveIt(jFrame);
jFrame.repaint();
jFrame.validate();
}
});
}
});
jFrame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
jFrame.setLayout(new FlowLayout());
jFrame.getContentPane().add(instructionalExample);
jFrame.pack();
jFrame.setLocationRelativeTo(null);
jFrame.setVisible(true);