我一直在尝试将JLabel时钟旋转180度，因此它是颠倒的，我已经完成了一些搜索并尝试使用Graphics2D实现它，但是我找不到一种方法让它在没有乱糟糟的东西的情况下工作。任何帮助表示赞赏。
我最大的麻烦似乎是因为我使用NetBeans自动创建了jLabel，当我尝试添加我从其他示例中看到的Graphics2D代码行时，整个块停止工作。
package time;
import java.awt.Color;
import java.awt.Toolkit;
import java.util.Calendar;
import java.util.GregorianCalendar;
import java.text.DecimalFormat;
import javax.swing.JTextField;
/**
*
* @author beaty
*/
public class Interface extends javax.swing.JFrame {
/**
* Creates new form Interface
*/
public Interface() {
//Sets background as black and makes it auto fullscreen, windowed
getContentPane().setBackground(Color.black);
initComponents();
//make fullscreen
Toolkit tk = Toolkit.getDefaultToolkit();
int xsize = (int) tk.getScreenSize().getWidth();
int ysize = (int) tk.getScreenSize().getHeight();
this.setSize(xsize, ysize);
//Thread generates the calendar and autoupdates
new Thread()
{
public void run()
{
while(true)
{
Calendar cal = new GregorianCalendar();
DecimalFormat fmt = new DecimalFormat("00");
int hour = cal.get(Calendar.HOUR);
int minute = cal.get(Calendar.MINUTE);
int second = cal.get(Calendar.SECOND);
int AM_PM = cal.get(Calendar.AM_PM);
String day_night = "";
if(AM_PM ==1)
{
day_night = "PM";
}
else
{
day_night = "AM";
}
if(hour == 0)
{
hour = 12;
}
else
{
}
String time = hour + ":" + fmt.format(minute) + " " + day_night;
/* Swap this trime string to add seconds
*String time = hour + ":" + fmt.format(minute) + ":" + fmt.format(second) + " " + day_night;
*/
Clock.setText(time);
}
}
}.start();
}
/**
* 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() {
Clock = new javax.swing.JLabel();
jButton1 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setTitle("WHPL Clock");
setAutoRequestFocus(false);
setBackground(new java.awt.Color(0, 0, 0));
setUndecorated(true);
Clock.setBackground(new java.awt.Color(0, 0, 0));
Clock.setFont(new java.awt.Font("DS-Digital", 0, 300)); // NOI18N
Clock.setForeground(new java.awt.Color(255, 255, 255));
Clock.setText("7:45");
Clock.setHorizontalAlignment(JTextField.CENTER);
jButton1.setIcon(new javax.swing.ImageIcon(getClass().getResource("/time/exit.png"))); // NOI18N
jButton1.setActionCommand("System.out(0);");
jButton1.setBorder(new javax.swing.border.MatteBorder(new javax.swing.ImageIcon(getClass().getResource("/time/exit.png")))); // NOI18N
jButton1.setBorderPainted(false);
jButton1.setSelectedIcon(new javax.swing.ImageIcon(getClass().getResource("/time/exit_selected.png"))); // NOI18N
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(115, 115, 115)
.addComponent(Clock, javax.swing.GroupLayout.DEFAULT_SIZE, 1232, Short.MAX_VALUE))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 28, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(63, 63, 63)
.addComponent(Clock, javax.swing.GroupLayout.PREFERRED_SIZE, 221, Short.MAX_VALUE)
.addContainerGap())
);
getAccessibleContext().setAccessibleDescription("");
pack();
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
// Button action to exit application
System.exit(0);
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<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(Interface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Interface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(Interface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Interface.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 Interface().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JLabel Clock;
private javax.swing.JButton jButton1;
// End of variables declaration
}
答案 0 :(得分：0)
我一直试图将JLabel时钟旋转180度，使其颠倒
为什么呢？谁想尝试颠倒阅读文字？
尝试使用Graphics2D实现它
在哪儿？我没有看到任何使用Graphics的代码？
Swing并非真正用于旋转组件。
你可以看看：
Text Icon - 它会生成一个看起来像文字的图标。
Rotated Icon - 允许您将图标旋转180度。
但是这两个图标在一起，你有一个实现，它基本上允许你通过旋转图标来旋转文本。