代码如下,
问问大虾,
不用内部类怎么清空text(我用的是内部类)
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;public class Example10_7{
public static void main(String[] args) { MyWindow win = new MyWindow(); }
} class MyWindow extends JFrame{
JTextField text;
Polices police; MyWindow(){
setLayout(new FlowLayout());
text = new JTextField(15);
add(text);
police = new Polices();
text.addActionListener(police);
setBounds(300,400,200,150);
setVisible(true);
validate();
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
class Polices implements ActionListener{
public void actionPerformed(ActionEvent e){
String str = e.getActionCommand();
System.out.println(str);
System.out.println(str.length());
text.setText("");
}
}
}
问问大虾,
不用内部类怎么清空text(我用的是内部类)
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;public class Example10_7{
public static void main(String[] args) { MyWindow win = new MyWindow(); }
} class MyWindow extends JFrame{
JTextField text;
Polices police; MyWindow(){
setLayout(new FlowLayout());
text = new JTextField(15);
add(text);
police = new Polices();
text.addActionListener(police);
setBounds(300,400,200,150);
setVisible(true);
validate();
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
class Polices implements ActionListener{
public void actionPerformed(ActionEvent e){
String str = e.getActionCommand();
System.out.println(str);
System.out.println(str.length());
text.setText("");
}
}
}
public static void main(String[] args) {MyWindow win = new MyWindow();}
}
这只是在这个类中调用另一个类去处理逻辑了。不是内部类。
public class Example10_7{
public static void main(String[] args) { MyWindow win = new MyWindow(); }
} class MyWindow extends JFrame{ MyWindow(){
}
class Polices implements ActionListener{
public void actionPerformed(ActionEvent e){
}
}
}
我也不知道啊 觉得Polices是MyWindow得内部类。你再帮我确定一下是不是内部类
import java.awt.event.*;
import javax.swing.*;public class Example10_7 {
public static void main(String[] args) { MyWindow win = new MyWindow(); }
}class MyWindow extends JFrame {
JTextField text; MyWindow() {
setLayout(new FlowLayout());
text = new JTextField(15);
add(text); text.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String str = e.getActionCommand();
System.out.println(str);
System.out.println(str.length());
text.setText("");
}
});
setBounds(300, 400, 200, 150);
setVisible(true);
validate();
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;public class Example10_7 {
public static void main(String[] args) { MyWindow win = new MyWindow(); }
}class MyWindow extends JFrame {
JTextField text;
Polices police; MyWindow() {
setLayout(new FlowLayout());
text = new JTextField(15);
add(text);
police = new Polices(text);
text.addActionListener(police);
setBounds(300, 400, 200, 150);
setVisible(true);
validate();
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}class Polices implements ActionListener {
JTextField t;
public Polices(JTextField textfield) {
t = textfield;
}
public void actionPerformed(ActionEvent e) {
String str = e.getActionCommand();
System.out.println(str);
System.out.println(str.length());
t.setText("");
}
}