源代码如下:package test;import javax.swing.*;
import java.awt.*;
import java.awt.event.*;/**
* <p>Title: </p>
* <p>Description: </p>
* <p>Copyright: Copyright (c) 2008</p>
* <p>Company: </p>
* @author not attributable
* @version 1.0
*/public class Frame1
extends JFrame {
JButton jButton1 = new JButton();
JButton jButton2 = new JButton();
JLabel jLabel1 = new JLabel();
JLabel jLabel2 = new JLabel();
JTextArea jTextArea1 = new JTextArea();
JTextArea jTextArea2 = new JTextArea();
JLabel jLabel3 = new JLabel();
JTextArea jTextArea3 = new JTextArea();
Component component1;
Frame1 frame1;
Dialog d;
public Frame1() {
try {
jbInit();
}
catch (Exception e) {
e.printStackTrace();
}
} public static void main(String[] args) {
Frame1 frame1 = new Frame1();
frame1.setTitle("演示窗体");
frame1.setBounds(200, 200, 350, 350);
frame1.setVisible(true);
Dialog d = new Dialog(frame1,"This is a error"); //创建一个对话框的对象 } private void jbInit() throws Exception {
component1 = Box.createGlue();
jButton1.setBounds(new Rectangle(100, 218, 84, 24));
jButton1.setText("OK");
jButton1.addActionListener(new Frame1_jButton1_actionAdapter(this));
this.getContentPane().setLayout(null);
jButton2.setBounds(new Rectangle(206, 218, 91, 25));
jButton2.setText("Cancel");
jButton2.addActionListener(new Frame1_jButton2_actionAdapter(this));
jLabel1.setText("a");
jLabel1.setBounds(new Rectangle(125, 56, 76, 30));
jLabel2.setText("b");
jLabel2.setBounds(new Rectangle(125, 108, 34, 16));
jTextArea1.setText("");
jTextArea1.setBounds(new Rectangle(211, 62, 60, 18));
jTextArea2.setText("");
jTextArea2.setBounds(new Rectangle(211, 114, 60, 18));
jLabel3.setText("a+b=");
jLabel3.setBounds(new Rectangle(128, 170, 34, 16));
jTextArea3.setText("");
jTextArea3.setBounds(new Rectangle(209, 168, 62, 16));
component1.setBounds(new Rectangle(343, 254, 42, 36));
this.getContentPane().add(jTextArea1, null);
this.getContentPane().add(jTextArea2, null);
this.getContentPane().add(jLabel1, null);
this.getContentPane().add(jLabel2, null);
this.getContentPane().add(jButton1, null);
this.getContentPane().add(jButton2, null);
this.getContentPane().add(component1, null);
this.getContentPane().add(jLabel3, null);
this.getContentPane().add(jTextArea3, null);
} void jButton1_actionPerformed(ActionEvent e) {
try{
String a = jTextArea1.getText();
Integer i = new Integer(a);
int j1 = i.intValue();
String a2 = jTextArea2.getText();
Integer i2 = new Integer(a2);
int j2 =i2.intValue();
int j3= j1+ j2;
String a3 = new String().valueOf(j3);
jTextArea3.setText(a3);
}
catch(Exception en)
{ d.setVisible(true);//为了捕获出现异常输入时,弹出对话框。
}
} void jButton2_actionPerformed(ActionEvent e) {
System.exit(1);
}
}class Frame1_jButton1_actionAdapter
implements java.awt.event.ActionListener {
Frame1 adaptee; Frame1_jButton1_actionAdapter(Frame1 adaptee) {
this.adaptee = adaptee;
} public void actionPerformed(ActionEvent e) {
adaptee.jButton1_actionPerformed(e);
}
}class Frame1_jButton2_actionAdapter
implements java.awt.event.ActionListener {
Frame1 adaptee; Frame1_jButton2_actionAdapter(Frame1 adaptee) {
this.adaptee = adaptee;
} public void actionPerformed(ActionEvent e) {
adaptee.jButton2_actionPerformed(e);
}
}
如上所示:
当我输入字符类型的时候,能够捕获到异常,但无法正常执行对话框的提示信息,请大家帮小弟分析一下原因。
import java.awt.*;
import java.awt.event.*;/**
* <p>Title: </p>
* <p>Description: </p>
* <p>Copyright: Copyright (c) 2008</p>
* <p>Company: </p>
* @author not attributable
* @version 1.0
*/public class Frame1
extends JFrame {
JButton jButton1 = new JButton();
JButton jButton2 = new JButton();
JLabel jLabel1 = new JLabel();
JLabel jLabel2 = new JLabel();
JTextArea jTextArea1 = new JTextArea();
JTextArea jTextArea2 = new JTextArea();
JLabel jLabel3 = new JLabel();
JTextArea jTextArea3 = new JTextArea();
Component component1;
Frame1 frame1;
Dialog d;
public Frame1() {
try {
jbInit();
}
catch (Exception e) {
e.printStackTrace();
}
} public static void main(String[] args) {
Frame1 frame1 = new Frame1();
frame1.setTitle("演示窗体");
frame1.setBounds(200, 200, 350, 350);
frame1.setVisible(true);
Dialog d = new Dialog(frame1,"This is a error"); //创建一个对话框的对象 } private void jbInit() throws Exception {
component1 = Box.createGlue();
jButton1.setBounds(new Rectangle(100, 218, 84, 24));
jButton1.setText("OK");
jButton1.addActionListener(new Frame1_jButton1_actionAdapter(this));
this.getContentPane().setLayout(null);
jButton2.setBounds(new Rectangle(206, 218, 91, 25));
jButton2.setText("Cancel");
jButton2.addActionListener(new Frame1_jButton2_actionAdapter(this));
jLabel1.setText("a");
jLabel1.setBounds(new Rectangle(125, 56, 76, 30));
jLabel2.setText("b");
jLabel2.setBounds(new Rectangle(125, 108, 34, 16));
jTextArea1.setText("");
jTextArea1.setBounds(new Rectangle(211, 62, 60, 18));
jTextArea2.setText("");
jTextArea2.setBounds(new Rectangle(211, 114, 60, 18));
jLabel3.setText("a+b=");
jLabel3.setBounds(new Rectangle(128, 170, 34, 16));
jTextArea3.setText("");
jTextArea3.setBounds(new Rectangle(209, 168, 62, 16));
component1.setBounds(new Rectangle(343, 254, 42, 36));
this.getContentPane().add(jTextArea1, null);
this.getContentPane().add(jTextArea2, null);
this.getContentPane().add(jLabel1, null);
this.getContentPane().add(jLabel2, null);
this.getContentPane().add(jButton1, null);
this.getContentPane().add(jButton2, null);
this.getContentPane().add(component1, null);
this.getContentPane().add(jLabel3, null);
this.getContentPane().add(jTextArea3, null);
} void jButton1_actionPerformed(ActionEvent e) {
try{
String a = jTextArea1.getText();
Integer i = new Integer(a);
int j1 = i.intValue();
String a2 = jTextArea2.getText();
Integer i2 = new Integer(a2);
int j2 =i2.intValue();
int j3= j1+ j2;
String a3 = new String().valueOf(j3);
jTextArea3.setText(a3);
}
catch(Exception en)
{ d.setVisible(true);//为了捕获出现异常输入时,弹出对话框。
}
} void jButton2_actionPerformed(ActionEvent e) {
System.exit(1);
}
}class Frame1_jButton1_actionAdapter
implements java.awt.event.ActionListener {
Frame1 adaptee; Frame1_jButton1_actionAdapter(Frame1 adaptee) {
this.adaptee = adaptee;
} public void actionPerformed(ActionEvent e) {
adaptee.jButton1_actionPerformed(e);
}
}class Frame1_jButton2_actionAdapter
implements java.awt.event.ActionListener {
Frame1 adaptee; Frame1_jButton2_actionAdapter(Frame1 adaptee) {
this.adaptee = adaptee;
} public void actionPerformed(ActionEvent e) {
adaptee.jButton2_actionPerformed(e);
}
}
如上所示:
当我输入字符类型的时候,能够捕获到异常,但无法正常执行对话框的提示信息,请大家帮小弟分析一下原因。
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import java.awt.*;
import java.awt.event.*;/**
* <p>
* Title:
* </p>
* <p>
* Description:
* </p>
* <p>
* Copyright: Copyright (c) 2008
* </p>
* <p>
* Company:
* </p>
*
* @author not attributable
* @version 1.0
*/public class Frame1 extends JFrame {
JButton jButton1 = new JButton(); JButton jButton2 = new JButton(); JLabel jLabel1 = new JLabel(); JLabel jLabel2 = new JLabel(); JTextArea jTextArea1 = new JTextArea(); JTextArea jTextArea2 = new JTextArea(); JLabel jLabel3 = new JLabel(); JTextArea jTextArea3 = new JTextArea(); Component component1; Frame1 frame1; Dialog d; public Frame1() {
try {
jbInit();
d = new Dialog(frame1, "This is a error");
} catch (Exception e) {
e.printStackTrace();
}
} public static void main(String[] args) {
Frame1 frame1 = new Frame1();
frame1.setTitle("Frame");
frame1.setBounds(200, 200, 350, 350);
frame1.setVisible(true);
// Dialog d = new Dialog(frame1, "This is a error"); } private void jbInit() throws Exception {
component1 = Box.createGlue();
jButton1.setBounds(new Rectangle(100, 218, 84, 24));
jButton1.setText("OK");
jButton1.addActionListener(new Frame1_jButton1_actionAdapter(this));
this.getContentPane().setLayout(null);
jButton2.setBounds(new Rectangle(206, 218, 91, 25));
jButton2.setText("Cancel");
jButton2.addActionListener(new Frame1_jButton2_actionAdapter(this));
jLabel1.setText("a");
jLabel1.setBounds(new Rectangle(125, 56, 76, 30));
jLabel2.setText("b");
jLabel2.setBounds(new Rectangle(125, 108, 34, 16));
jTextArea1.setText("");
jTextArea1.setBounds(new Rectangle(211, 62, 60, 18));
jTextArea2.setText("");
jTextArea2.setBounds(new Rectangle(211, 114, 60, 18));
jLabel3.setText("a+b=");
jLabel3.setBounds(new Rectangle(128, 170, 34, 16));
jTextArea3.setText("");
jTextArea3.setBounds(new Rectangle(209, 168, 62, 16));
component1.setBounds(new Rectangle(343, 254, 42, 36));
this.getContentPane().add(jTextArea1, null);
this.getContentPane().add(jTextArea2, null);
this.getContentPane().add(jLabel1, null);
this.getContentPane().add(jLabel2, null);
this.getContentPane().add(jButton1, null);
this.getContentPane().add(jButton2, null);
this.getContentPane().add(component1, null);
this.getContentPane().add(jLabel3, null);
this.getContentPane().add(jTextArea3, null);
} void jButton1_actionPerformed(ActionEvent e) {
try {
String a = jTextArea1.getText();
Integer i = new Integer(a);
int j1 = i.intValue();
String a2 = jTextArea2.getText();
Integer i2 = new Integer(a2);
int j2 = i2.intValue();
int j3 = j1 + j2;
String a3 = new String().valueOf(j3);
jTextArea3.setText(a3);
} catch (Exception en) {
d.setVisible(true);
}
} void jButton2_actionPerformed(ActionEvent e) {
System.exit(1);
}
}class Frame1_jButton1_actionAdapter implements java.awt.event.ActionListener {
Frame1 adaptee; Frame1_jButton1_actionAdapter(Frame1 adaptee) {
this.adaptee = adaptee;
} public void actionPerformed(ActionEvent e) {
adaptee.jButton1_actionPerformed(e);
}
}class Frame1_jButton2_actionAdapter implements java.awt.event.ActionListener {
Frame1 adaptee; Frame1_jButton2_actionAdapter(Frame1 adaptee) {
this.adaptee = adaptee;
} public void actionPerformed(ActionEvent e) {
adaptee.jButton2_actionPerformed(e);
}
}
对象用错了