package Test_Gui;import java.awt.Frame;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;public class aa { public static void main(String[] args) {
new MyFrame();
}
}
class MyFrame extends Frame{
public void MyFrame(){
setSize(300,300);
this.setLocation(300, 300);
this.addKeyListener(new MyKetMonet());
this.setVisible(true);
this.addWindowListener(new WindowAdapter(){
@SuppressWarnings("unused")
public void windowColsing(){
setVisible(false);
System.exit(0);
}
});
}
}
class MyKetMonet extends KeyAdapter{
public void KeyPressed(KeyEvent e){
int i = e.getKeyCode();
if(i==KeyEvent.VK_UP){
System.out.println("OK");
}
}
}
之后编译的时候没有错误 运行的时候报了一个
Exception in thread "main" java.lang.NoSuchMethodError: Test_Gui.MyFrame: method <init>()V not found
at Test_Gui.aa.main(aa.java:11)
错误 可是并没有给我提示啊
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;public class aa { public static void main(String[] args) {
new MyFrame();
}
}
class MyFrame extends Frame{
public void MyFrame(){
setSize(300,300);
this.setLocation(300, 300);
this.addKeyListener(new MyKetMonet());
this.setVisible(true);
this.addWindowListener(new WindowAdapter(){
@SuppressWarnings("unused")
public void windowColsing(){
setVisible(false);
System.exit(0);
}
});
}
}
class MyKetMonet extends KeyAdapter{
public void KeyPressed(KeyEvent e){
int i = e.getKeyCode();
if(i==KeyEvent.VK_UP){
System.out.println("OK");
}
}
}
之后编译的时候没有错误 运行的时候报了一个
Exception in thread "main" java.lang.NoSuchMethodError: Test_Gui.MyFrame: method <init>()V not found
at Test_Gui.aa.main(aa.java:11)
错误 可是并没有给我提示啊
voidMyFrame(){还是报错Exception in thread "main" java.lang.NoSuchMethodError: Test_Gui.MyFrame: method <init>()V not found
at Test_Gui.aa.main(aa.java:11)
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;public class aa { public static void main(String[] args) {
new MyFrame();
}
}
class MyFrame extends Frame{ public MyFrame(){ setSize(300,300);
this.setLocation(300, 300);
this.addKeyListener(new MyKetMonet());
this.setVisible(true);
this.addWindowListener(new WindowAdapter(){
@SuppressWarnings("unused") @Override
public void windowClosing(WindowEvent e){
setVisible(false);
System.exit(0);
}
});
}
}
class MyKetMonet extends KeyAdapter{
@Override
public void keyPressed(KeyEvent e){
int i = e.getKeyCode();
if(i==KeyEvent.VK_UP){
System.out.println("OK");
}
}
}
不止一个错误,两个监听器里全都拼写错。这样编译运行
mkdir classes
javac -d classes aa.java
java -cp classes Test_Gui.aa