类图：
代码：
package swingDesign;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JLabel;
import java.awt.Font;
import javax.swing.JTextField;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class Triangle extends JFrame {
private JPanel contentPane;
private JTextField aside;
private JTextField bside;
private JTextField cside;
private JTextField resulttext;
private JTextField square;
private JTextField length;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Triangle frame = new Triangle();
frame.getContentPane().setLayout(null);
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public Triangle() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setLayout(null);
setContentPane(contentPane);
JLabel lab = new JLabel("\u8BF7\u8F93\u5165\u4E09\u89D2\u5F62\u7684\u4E09\u6761\u8FB9\uFF1A");
lab.setFont(new Font("黑体", Font.PLAIN, 14));
contentPane.add(lab);
lab.setBounds(129, 10, 196, 32);
JLabel laba = new JLabel("a:");
laba.setFont(new Font("黑体", Font.PLAIN, 14));
contentPane.add(laba);
laba.setBounds(64, 73, 36, 23);
JLabel labb = new JLabel("b:");
labb.setFont(new Font("黑体", Font.PLAIN, 14));
labb.setBounds(187, 73, 36, 23);
contentPane.add(labb);
JLabel labc = new JLabel("c:");
labc.setFont(new Font("黑体", Font.PLAIN, 14));
labc.setBounds(307, 73, 36, 23);
contentPane.add(labc);
aside = new JTextField();
aside.setBounds(84, 73, 66, 21);
contentPane.add(aside);
aside.setColumns(10);
bside = new JTextField();
bside.setBounds(206, 73, 66, 21);
contentPane.add(bside);
bside.setColumns(10);
cside = new JTextField();
cside.setBounds(329, 73, 66, 21);
contentPane.add(cside);
cside.setColumns(10);
final JButton btnOk = new JButton("OK");
btnOk.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if(e.getSource()==btnOk)
{
Caculate cacu =new Caculate();
int a=0,b=0,c=0;
String A,B,C;
A=aside.getText().toString();
B=bside.getText().toString();
C=cside.getText().toString();
//判断是否为数字
if(A.matches("[0-9]+") && B.matches("[0-9]+") && C.matches("[0-9]+"))
{
a = Integer.parseInt(A);
b = Integer.parseInt(B);
c = Integer.parseInt(C);
resulttext.setText(cacu.triangle(a,b,c));
square.setText(cacu.square(a,b,c)+"");
length.setText(cacu.length(a,b,c)+"");
}
else
{
resulttext.setText("输入有误，请重新输入");
}
}
}
});
btnOk.setFont(new Font("宋体", Font.PLAIN, 14));
btnOk.setBounds(118, 119, 79, 23);
contentPane.add(btnOk);
final JButton btnCancel = new JButton("CANCEL");
btnCancel.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if(e.getSource()==btnCancel)
{
aside.setText("");
bside.setText("");
cside.setText("");
resulttext.setText("");
square.setText("");
length.setText("");
JOptionPane.showMessageDialog(null,"已重置");
}
}
});
btnCancel.setFont(new Font("宋体", Font.PLAIN, 14));
btnCancel.setBounds(246, 119, 79, 23);
contentPane.add(btnCancel);
JLabel label = new JLabel("\u8FD9\u4E2A\u4E09\u89D2\u5F62\u662F:");
label.setFont(new Font("宋体", Font.PLAIN, 14));
label.setBounds(84, 164, 113, 23);
contentPane.add(label);
resulttext = new JTextField();
resulttext.setBounds(183, 165, 136, 21);
contentPane.add(resulttext);
resulttext.setColumns(10);
JLabel label_1 = new JLabel("\u9762\u79EF\u662F:");
label_1.setFont(new Font("宋体", Font.PLAIN, 14));
label_1.setBounds(64, 208, 54, 15);
contentPane.add(label_1);
square = new JTextField();
square.setBounds(111, 205, 66, 21);
contentPane.add(square);
square.setColumns(10);
JLabel label_2 = new JLabel("\u5468\u957F\u662F:");
label_2.setFont(new Font("宋体", Font.PLAIN, 14));
label_2.setBounds(233, 208, 54, 15);
contentPane.add(label_2);
length = new JTextField();
length.setBounds(283, 205, 66, 21);
contentPane.add(length);
length.setColumns(10);
}
}
package swingDesign;
import java.text.DecimalFormat;
public class Caculate {
public final static int DENGBIAN = 0;
public final static int DENGYAO = 1;
public final static int ZHIJIAO = 2;
public final static int YIBAN = 3;
private int a;
private int b;
private int c;
protected int checkType()//判断三角形种类
{
if(a==b&&a==c&&b==c)
return DENGBIAN;
if(a==b||a==c||b==c)
return DENGYAO;
if(a*a+b*b==c*c||a*a==b*b+c*c||b*b==a*a+c*c)
return ZHIJIAO;
return YIBAN;
}
protected boolean checkTheOne()//检查范围条件
{
if((a>=1&&a<=100)&&(b>=1&&b<=100)&&(c>=1&&c<=100))
return true;
else
return false;
}
protected boolean checkTheTwo()//检查是否组成三角形
{
if((a<(b+c))&&(b<(a+c))&&(c<(a+b)))
return true;
else
return false;
}
public String triangle( int a, int b, int c)//题目要求的函数
{
String ch = null;
this.a = a;
this.b = b;
this.c = c;
if(!checkTheOne())
{
ch = "边的值不在范围内";
}
else if(!checkTheTwo())
{
ch = "不构成三角形";
}
else
{
switch(checkType())
{
case DENGBIAN: ch = "等边三角形";break;
case DENGYAO: ch = "等腰三角形";break;
case ZHIJIAO: ch = "直角三角形";break;
case YIBAN: ch = "一般三角形";break;
}
}
return ch;
}
public String square(int a,int b,int c)
{
String temp = triangle(a, b, c);
DecimalFormat df = new DecimalFormat("#.00");
float result=0;
float p;
String mianjiresult = null;
if(!temp.equals("边的值不在范围内") &&!temp.equals("不构成三角形"))
{
p=(float) ((a+b+c)/2.0);
result=(float) (Math.sqrt(p*(p-a)*(p-b)*(p-c)));
mianjiresult=df.format(result);
}
return mianjiresult;
}
public int length(int a,int b,int c)
{
String temp = triangle(a, b, c);
int result=0;
if(!temp.equals("边的值不在范围内") &&!temp.equals("不构成三角形"))
{
result=a+b+c;
}
return result;
}
}
结果：
时间： 2024-11-06 21:58:50