package TestFrame;import java.awt.*;
import java.awt.event.*;public class TestFrame { /**
* @param args
*/
public static void main(String[] args) {
myFrame f = new myFrame("custome"); }}class myFrame extends Frame { private static final long serialVersionUID = 1744809883291099336L; TextArea ta1, ta2; myFrame(String name) { Panel p1 = new Panel(); Panel p2 = new Panel();
Panel p3 = new Panel();
Button b1 = new Button("提交"); ta1 = new TextArea();
ta2 = new TextArea();
p1.add(ta1);
p2.add(ta2);
p3.add(b1);
setLayout(new GridLayout(3, 1));
add(p1);
add(p2);
add(p3);
b1.addActionListener(new ButtonMonitor()); setLocation(300, 300);
setBackground(new Color(200, 200, 200));
setSize(500, 500);
setVisible(true); class ButtonMonitor implements ActionListener { public void actionPerformed(ActionEvent arg0) {
ta1.setText(ta2.getText()); } }
this.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) {
setVisible(false);
System.exit(-1);
}
}); }}各位老大看下我加载button上的那个监听器是不是出问题了,报错为:
Exception in thread "main" java.lang.Error: Unresolved compilation problem:
ButtonMonitor cannot be resolved to a type at TestFrame.myFrame.<init>(TestFrame.java:42)
at TestFrame.TestFrame.main(TestFrame.java:12)谢谢了
import java.awt.event.*;public class TestFrame { /**
* @param args
*/
public static void main(String[] args) {
myFrame f = new myFrame("custome"); }}class myFrame extends Frame { private static final long serialVersionUID = 1744809883291099336L; TextArea ta1, ta2; myFrame(String name) { Panel p1 = new Panel(); Panel p2 = new Panel();
Panel p3 = new Panel();
Button b1 = new Button("提交"); ta1 = new TextArea();
ta2 = new TextArea();
p1.add(ta1);
p2.add(ta2);
p3.add(b1);
setLayout(new GridLayout(3, 1));
add(p1);
add(p2);
add(p3);
b1.addActionListener(new ButtonMonitor()); setLocation(300, 300);
setBackground(new Color(200, 200, 200));
setSize(500, 500);
setVisible(true); class ButtonMonitor implements ActionListener { public void actionPerformed(ActionEvent arg0) {
ta1.setText(ta2.getText()); } }
this.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) {
setVisible(false);
System.exit(-1);
}
}); }}各位老大看下我加载button上的那个监听器是不是出问题了,报错为:
Exception in thread "main" java.lang.Error: Unresolved compilation problem:
ButtonMonitor cannot be resolved to a type at TestFrame.myFrame.<init>(TestFrame.java:42)
at TestFrame.TestFrame.main(TestFrame.java:12)谢谢了
import java.awt.*;
import java.awt.event.*;public class TestFrame { /**
* @param args
*/
public static void main(String[] args) {
myFrame f = new myFrame("custome"); }}class myFrame extends Frame { private static final long serialVersionUID = 1744809883291099336L; TextArea ta1, ta2; myFrame(String name) { Panel p1 = new Panel(); Panel p2 = new Panel();
Panel p3 = new Panel();
Button b1 = new Button("提交"); ta1 = new TextArea();
ta2 = new TextArea();
p1.add(ta1);
p2.add(ta2);
p3.add(b1);
setLayout(new GridLayout(3, 1));
add(p1);
add(p2);
add(p3);
b1.addActionListener(new ButtonMonitor()); setLocation(300, 300);
setBackground(new Color(200, 200, 200));
setSize(500, 500);
setVisible(true);
this.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) {
setVisible(false);
System.exit(-1);
}
}); }
class ButtonMonitor implements ActionListener { public void actionPerformed(ActionEvent arg0) {
ta1.setText(ta2.getText()); } }}
import java.awt.event.*;public class TestFrame { public static void main(String[] args) {
myFrame f = new myFrame("custome"); }}class myFrame extends Frame { private static final long serialVersionUID = 1744809883291099336L; TextArea ta1, ta2;
static String name; myFrame(String name) {
super(name);
name=name;
Panel p1 = new Panel(); Panel p2 = new Panel();
Panel p3 = new Panel();
Button b1 = new Button("提交"); ta1 = new TextArea();
ta2 = new TextArea();
p1.add(ta1);
p2.add(ta2);
p3.add(b1);
setLayout(new GridLayout(3, 1));
add(p1);
add(p2);
add(p3);
b1.addActionListener(new ButtonMonitor()); setLocation(300, 300);
setBackground(new Color(200, 200, 200));
setSize(500, 500);
setVisible(true); this.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) {
setVisible(false);
System.exit(-1);
}
}); }
class ButtonMonitor implements ActionListener { public void actionPerformed(ActionEvent arg0) {
ta1.setText(name+ta2.getText());
ta2.setText(null); } }}
谢谢上面的老大。呵呵。我在MyFrame 声明了一个全局变量name,然后在构造函数里对它进行了赋值,可为什么在内部类ButtonMonitor中name的值依旧为空呢
要这样写:this.name=name;