这是一个音乐播放器。它工作正常，但当我尝试创建一个Jframe我失败。
我有3个jTextfields，它应该呈现我的游戏时间和剩余的游戏时间。但是在程序中他们没有更新。
import java.awt.*;
import java.awt.event.*;
import java.io.File;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
//
import javax.sound.midi.InvalidMidiDataException;
import javax.sound.midi.MidiSystem;
import javax.sound.midi.MidiUnavailableException;
import javax.sound.midi.Sequencer;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.WindowConstants;
import javax.swing.*;
import javax.swing.event.*;
/**
*
* Beschreibung
*
* @version 1.0 vom 26.10.2015
* @author
*/
public class test extends JFrame {
// Anfang Attribute
private static File chossen = new File("");
private static int x=1;
private static JTextField jTextField1 = new JTextField();
private static JTextField jTextField2 = new JTextField();
private static JTextField jTextField3 = new JTextField();
private JLabel jLabel1 = new JLabel();
private JLabel jLabel2 = new JLabel();
private JLabel jLabel3 = new JLabel();
private static JProgressBar jProgressBar1 = new JProgressBar();
private JButton jButton1 = new JButton();
private JButton jButton2 = new JButton();
private JButton jButton3 = new JButton();
// Ende Attribute
public test(String title) throws MidiUnavailableException {
// Frame-Initialisierung
super(title);
setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
int frameWidth = 574;
int frameHeight = 412;
setSize(frameWidth, frameHeight);
Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
int x = (d.width - getSize().width) / 2;
int y = (d.height - getSize().height) / 2;
setLocation(x, y);
setResizable(false);
Container cp = getContentPane();
cp.setLayout(null);
// Anfang Komponenten
jTextField1.setBounds(400, 8, 150, 20);
cp.add(jTextField1);
jTextField2.setBounds(400, 32, 150, 20);
cp.add(jTextField2);
jTextField3.setBounds(400, 56, 150, 20);
cp.add(jTextField3);
jLabel1.setBounds(288, 8, 110, 20);
jLabel1.setText("Gesamte Dauer");
cp.add(jLabel1);
jLabel2.setBounds(288, 32, 110, 20);
jLabel2.setText("Aktuelle Dauer");
cp.add(jLabel2);
jLabel3.setBounds(288, 56, 110, 20);
jLabel3.setText("Verbleibend");
cp.add(jLabel3);
jProgressBar1.setBounds(280, 88, 270, 16);
cp.add(jProgressBar1);
jButton1.setBounds(480, 344, 75, 25);
jButton1.setText("Start");
jButton1.setMargin(new Insets(2, 2, 2, 2));
jButton1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
try {
jButton1_ActionPerformed(evt);
} catch (MidiUnavailableException | InvalidMidiDataException | IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
cp.add(jButton1);
jButton2.setBounds(400, 344, 75, 25);
jButton2.setText("Stop");
jButton2.setMargin(new Insets(2, 2, 2, 2));
jButton2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
try {
jButton2_ActionPerformed(evt);
} catch (MidiUnavailableException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvalidMidiDataException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
cp.add(jButton2);
jButton3.setBounds(8, 8, 267, 73);
jButton3.setText("Dateiauswahl");
jButton3.setMargin(new Insets(2, 2, 2, 2));
jButton3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
jButton3_ActionPerformed(evt);
}
});
cp.add(jButton3);
// Ende Komponenten
setVisible(true);
} // end of public test
// Anfang Methoden
public static void main(String[] args) throws MidiUnavailableException {
new test("test");
} // end of main
public void test(int zahl) throws MidiUnavailableException, InvalidMidiDataException, IOException, InterruptedException{
final Sequencer sequencer = MidiSystem.getSequencer();
sequencer.open();
if(zahl==2){
sequencer.setSequence(MidiSystem.getSequence(chossen));
sequencer.setTempoFactor(1);
sequencer.start();
System.out.println("start");
Thread.sleep(5000);
System.out.println("tettstdt");
x=1;
while(x==1){
long z = sequencer.getMicrosecondLength()/1000/1000;
long y=sequencer.getMicrosecondPosition()/1000/1000;
jProgressBar1.setMinimum(0);
jProgressBar1.setMaximum((int) z);
jTextField1.setText(z+"s");
z = sequencer.getMicrosecondLength()/1000/1000;
y=sequencer.getMicrosecondPosition()/1000/1000;
System.out.println(z+" "+y);
jProgressBar1.setValue((int) y);
jTextField2.setText(y+"s");
jTextField3.setText("s");
if(z-y==0){
x=0;
}
}
}else if(zahl==3){
System.out.println("stop fehlerhaft");
sequencer.stop();
}else{
System.out.println("fehler");
}
}
public void jButton1_ActionPerformed(ActionEvent evt) throws MidiUnavailableException, InvalidMidiDataException, IOException, InterruptedException {
System.out.println(chossen);
test(2);
}
public void jButton2_ActionPerformed(ActionEvent evt) throws MidiUnavailableException, InvalidMidiDataException, IOException {
// test(3);
}
public void jButton3_ActionPerformed(ActionEvent evt) {
File chossen2 = new File("C:/Users/Eric/workspace/Komplex/midi/"+ (dic()));
chossen = chossen2;
}
public static String dic() {
File f = new File("C:/Users/Eric/workspace/Komplex/midi");
JFileChooser fc = new JFileChooser();
fc.setCurrentDirectory(f);
int state = fc.showOpenDialog( null );
if ( state == JFileChooser.APPROVE_OPTION )
{
File file = fc.getSelectedFile();
return file.getName();
}
else
return "";
}
}
当我将信息打印到控制台时，它可以工作。
答案 0 :(得分：-2)
调用repaint()方法强制JTextField使用当前选项集重新绘制自己。