FangCheng6编程

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class FangCheng extends JFrame{
private boolean isStandalone = false;
JLabel jLabel1 = new JLabel("简易一元二次求解系统");
JLabel jLabel2 = new JLabel("方程参数：");
JLabel jLabel3 = new JLabel("求解结果：");
JLabel jLabel4 = new JLabel("a:");
JLabel jLabel5 = new JLabel("b:");
jTextField1.setBounds(new Rectangle(70, 75, 60, 30));
jTextField2.setForeground(Color.red);
jTextField2.setBounds(new Rectangle(70, 125, 60, 30));
"", JOptionPane.CLOSED_OPTION) ;
adaptee.jTextField1.setText("");
adaptee.jTextField2.setText("");
adaptee.jTextField3.setText("");
}
boolean Abandon(){
int value = JOptionPane.showConfirmDialog(this, "你输入的参数a=0，这样方程就不是一元二次方程!请重新输入正确的参数!",
"", JOptionPane.YES_OPTION);
x2 = ( -b - d) / (2 * a);
if(check==0){
jTextArea1.setText("b*b-4*a*c=0 \n\n" + "x1="+ x1 +"\n" + "x2=" + x2);
}
else{
jTextArea1.setText("b*b-4*a*c>0 \n\n" + "x1=" + x1 +"\n"+ "x2=" + x2);
jTextArea1.setBackground(SystemColor.desktop);
jTextArea1.setForeground(Color.red);
jTextArea1.setBounds(new Rectangle(185, 90, 175, 100));
jTextField1.setForeground(Color.red);
JLabel jLabel6 = new JLabel("c:");
JTextField jTextField1 = new JTextField();
JTextField jTextField2 = new JTextField();
JTextField jTextField3 = new JTextField();
add(jLabel3);
add(jLabel2);
add(jLabel4);
add(jLabel5);
add(jLabel6);
add(jTextField2);
add(jTextField3)
add(jButton1);
add(jTextArea1);
break;
}
return true;
}
public void result(){
try{
a = Integer.parseInt(jTextField1.getText());
b = Integer.parseInt(jTextField2.getText());
frame.setVisible(true);
}
//Construct the Application
public FangCheng(){
jLabel1.setFont(new java.awt.Font("Dialog", 1, 19));
jLabel1.setForeground(Color.red);
}
}
else{ //计算复根
float d;
d = (float) (Math.sqrt( -check));
x3 = -b / (2 * a);
x4 = d / (2 * a);
jTextArea1.setText("b*b-4*a*c<0 \n\n"+"x1=" + x3+"+" + x4 + "i"+"\n" + "x2=" + x3 +"-"+ x4 + "i");
JTextArea jTextArea1 = new JTextArea();
JButton jButton1 = new JButton("求 解");
float x1,x2,x3,x4;
float a,b,c;
float check;
public static void main(String ss[]){
switch (value){
case JOptionPane.YES_OPTION:
jTextField1.setText("");
jTextField2.setText("");
jTextField3.setText("");
jTextArea1.setText("");
FangCheng frame = new FangCheng();
//设置用户关闭框架时的响应动作
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//显示该框架
frame.setSize(450,350);
}
}
}
class Fangcheng_jButton1_actionAdapter implements java.awt.event.ActionListener{
FangCheng adaptee;
Fangcheng_jButton1_actionAdapter(FangCheng adaptee){
c = Integer.parseInt(jTextField3.getText());
check=b*b-4*a*c;
if (check >= 0){
float d;
d = (float) (Math.sqrt(check));
x1 = ( -b + d) / (2 * a);
jLabel1.setBounds(new Rectangle(100, 8, 200, 20));
jLabel2.setBounds(new Rectangle(60, 45, 80, 20));
jLabel3.setBounds(new Rectangle(230, 45, 80, 20));
//int value = JOptionPane.showConfirmDialog(adaptee, message, "", JOptionPane.CLOSED_OPTION);
int value = JOptionPane.showConfirmDialog(adaptee,"你输入的a参数有误!请重新输入正确的参数!",
this.adaptee = adaptee;
}
public void actionPerformed(ActionEvent e){
//adaptee.jButton1_actionPerformed(e);
try{
if(Integer.parseInt(adaptee.jTextField1.getText())==0){
jTextField3.setForeground(Color.red);
jTextField3.setBounds(new Rectangle(70, 175, 60, 30));
this.setLayout(null);
add(jLabel1);
add(jTextField1);
adaptee.jTextArea1.setText("");
}
}
}
jButton1.setBackground(SystemColor.desktop);
jButton1.setBounds(new Rectangle(128, 245, 116, 27));
jButton1.addActionListener(new Fangcheng_jButton1_actionAdapter(this));