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一个小问题？教教初学者吧！给分
来源: 互联网 发布时间：2015-02-06
本文导语: import java.awt.*; import java.awt.event.*; public class KeyEventTest extends Frame { private TextArea msgArea; public static void main(String args[]) { KeyEventTest test=new KeyEventTest(); test.setSize(300,300); test.setVisible(true); } public Ke...
import java.awt.*;
import java.awt.event.*;
public class KeyEventTest extends Frame {
private TextArea msgArea;
public static void main(String args[]) {
KeyEventTest test=new KeyEventTest();
test.setSize(300,300);
test.setVisible(true);
}
public KeyEventTest() {
msgArea=new TextArea();
msgArea.setEnabled(false);//让Button取得控制权
add(msgArea,BorderLayout.CENTER);
Button b=new Button("test");
b.addKeyListener(new KeyListen(this));//让Button能够处理KeyEvent
add(b,BorderLayout.SOUTH);
}
public void ShowMessage(String str) {
msgArea.append(str+"n");
}
}
class KeyListen implements KeyListener {//用来接收KeyEvent的类
private KeyEventTest parent;
public KeyListen(KeyEventTest p) {
parent=p;
}
public void KeyPressed(KeyEvent e) {
}
public void KeyReleased(KeyEvent e) {
parent.ShowMessage("Key char=" + e.getKeyChar());
parent.ShowMessage("Key code=" + e.getKeyCode());
parent.ShowMessage("modifier=" + e.getModifiers());
}
public void KeyTyped(KeyEvent e) {
}
}
这个程序该怎样改正确？我使用的是JDK帮忙解决给分！！
import java.awt.event.*;
public class KeyEventTest extends Frame {
private TextArea msgArea;
public static void main(String args[]) {
KeyEventTest test=new KeyEventTest();
test.setSize(300,300);
test.setVisible(true);
}
public KeyEventTest() {
msgArea=new TextArea();
msgArea.setEnabled(false);//让Button取得控制权
add(msgArea,BorderLayout.CENTER);
Button b=new Button("test");
b.addKeyListener(new KeyListen(this));//让Button能够处理KeyEvent
add(b,BorderLayout.SOUTH);
}
public void ShowMessage(String str) {
msgArea.append(str+"n");
}
}
class KeyListen implements KeyListener {//用来接收KeyEvent的类
private KeyEventTest parent;
public KeyListen(KeyEventTest p) {
parent=p;
}
public void KeyPressed(KeyEvent e) {
}
public void KeyReleased(KeyEvent e) {
parent.ShowMessage("Key char=" + e.getKeyChar());
parent.ShowMessage("Key code=" + e.getKeyCode());
parent.ShowMessage("modifier=" + e.getModifiers());
}
public void KeyTyped(KeyEvent e) {
}
}
这个程序该怎样改正确？我使用的是JDK帮忙解决给分！！
|
import java.awt.*;
import java.awt.event.*;
public class KeyEventTest extends Frame {
private TextArea msgArea;
public static void main(String args[]) {
KeyEventTest test=new KeyEventTest();
test.setSize(300,300);
test.setVisible(true);
}
public KeyEventTest() {
msgArea=new TextArea();
msgArea.setEnabled(false);//让Button取得控制权
add(msgArea,BorderLayout.CENTER);
Button b=new Button("test");
b.addKeyListener(new KeyListen(this));//让Button能够处理KeyEvent
add(b,BorderLayout.SOUTH);
}
public void ShowMessage(String str) {
msgArea.append(str+"n");
}
}
class KeyListen implements KeyListener {//用来接收KeyEvent的类
private KeyEventTest parent;
public KeyListen(KeyEventTest p) {
parent=p;
}
public void keyPressed(KeyEvent e) {
}
public void keyReleased(KeyEvent e) {
parent.ShowMessage("Key char=" + e.getKeyChar());
parent.ShowMessage("Key code=" + e.getKeyCode());
parent.ShowMessage("modifier=" + e.getModifiers());
}
public void keyTyped(KeyEvent e) {
}
}
你那三个事件，keyTyped什么的写成KeyTyped了，大小写错了，看看编译器提示吧
import java.awt.event.*;
public class KeyEventTest extends Frame {
private TextArea msgArea;
public static void main(String args[]) {
KeyEventTest test=new KeyEventTest();
test.setSize(300,300);
test.setVisible(true);
}
public KeyEventTest() {
msgArea=new TextArea();
msgArea.setEnabled(false);//让Button取得控制权
add(msgArea,BorderLayout.CENTER);
Button b=new Button("test");
b.addKeyListener(new KeyListen(this));//让Button能够处理KeyEvent
add(b,BorderLayout.SOUTH);
}
public void ShowMessage(String str) {
msgArea.append(str+"n");
}
}
class KeyListen implements KeyListener {//用来接收KeyEvent的类
private KeyEventTest parent;
public KeyListen(KeyEventTest p) {
parent=p;
}
public void keyPressed(KeyEvent e) {
}
public void keyReleased(KeyEvent e) {
parent.ShowMessage("Key char=" + e.getKeyChar());
parent.ShowMessage("Key code=" + e.getKeyCode());
parent.ShowMessage("modifier=" + e.getModifiers());
}
public void keyTyped(KeyEvent e) {
}
}
你那三个事件，keyTyped什么的写成KeyTyped了，大小写错了，看看编译器提示吧
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本站(WWW.)站内文章除注明原创外，均为转载、整理或搜集自网络。欢迎任何形式的转载，转载请注明出处。