第4次作业类测试代码+105032014070+胡阳洋

1、类图。

2、代码及界面。

package test.java.distinguish.triangle;


public class Distinguish {
	/**
	 * 
	 * @param a 三角形边的数值
	 * @param b 三角形边的数值
	 * @param c 三角形边的数值
	 * @return 返回存在几对相等的边
	 */
	private int SameLengthNum(int a,int b,int c){
		int count = 0;
		if(a==b){
			count++;//每存在一对相等的边计数加一
		}
		if(a==c){
			count++;
		}
		if(b==c){
			count++;
		}
		return count;
	}
	/**
	 * 
	 * @param a 三角形边的数值
	 * @param b 三角形边的数值
	 * @param c 三角形边的数值
	 * @return 返回三角形的类型
	 */
	public String Triangle(int a,int b,int c){
		String ch = null;
		if(!(1<=a&&a<=100) || !(1<=b&&b<=100) || !(1<=c&&c<=100)){
			return ch="边的值不在范围内";
		}
		if(!(a<(b+c)) || !(b<(a+c)) || !(c<(a+b))){
			return ch="不构成三角形";
		}
		switch(SameLengthNum( a, b, c)){//调用函数判断有几对边相等
			case 0:{
				if((a*a+b*b)==(c*c) || (a*a+c*c)==(b*b) || (c*c+b*b)==(a*a)){
					ch="直角三角形";
					break;
				}
				else{
					ch="一般三角形";
					break;
				}
			}//没有相等边
			case 1: ch="等腰三角形";break;//一对边相等
			case 3: ch="等边三角形";break;//三对边相等
		}
		return ch;
	}
	/**
	 * 
	 * @param value String型三角形边长数据数组
	 * @return	false:存在不是整数的值或获取的数据不足 true:验证通过
	 */
	public boolean Validation(String[] value){
		if(value.length<3){//没有三个数据
			return false;
		}
		try {
			for(int i=0;i<3;i++){
				int b = Integer.valueOf(value[i]).intValue();
			}
		} catch (NumberFormatException e){//不能转换成整型
			return false;
		}
		return true;
	}
	/**
	 * 
	 * @param a 三角形边的数值
	 * @param b 三角形边的数值
	 * @param c 三角形边的数值
	 * @return 返回三角形的周长
	 */
	public int Perimeter(int a,int b,int c){
		return a+b+c;
	}
	/**
	 * 
	 * @param a 三角形边的数值
	 * @param b 三角形边的数值
	 * @param c 三角形边的数值
	 * @return 返回三角形的面积
	 */
	public float TriangleArea(int a,int b,int c){
		float s = (float) (0.5*Perimeter( a, b, c));
		return (float) Math.sqrt((s*(s-a)*(s-b)*(s-c)));
	}
}

 界面代码:

package test.java.distinguish.view;

import java.awt.EventQueue;
import java.awt.Font;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextField;

import test.java.distinguish.triangle.Distinguish;

public class DisTriangle{

	private JFrame frame;
	
	private final JLabel label = new JLabel("请输入三角形的三条边:");
	private final JLabel lblA = new JLabel("a:");
	private final JLabel lblB = new JLabel("b:");
	private final JLabel lblC = new JLabel("c:");
	private final JLabel result_1 = new JLabel("这个三角形是:");
	private final JLabel result_2 = new JLabel("面积是:       周长是:");
	
	
	private final JTextField lengthOfa = new JTextField();
	private final JTextField lengthOfb = new JTextField();
	private final JTextField lengthOfc = new JTextField();
	
	private final JButton calculate = new JButton("计算");
	private final JButton clean = new JButton("清空");
	
	private Distinguish dis;

	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					new DisTriangle();
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}

	/**
	 * Create the frame.
	 * @wbp.parser.entryPoint
	 */
	public DisTriangle() {
		frame = new JFrame("三角形测算");
		frame.setBounds((Toolkit.getDefaultToolkit().getScreenSize().width/2)-256, (Toolkit.getDefaultToolkit().getScreenSize().height/2)-192, 512, 384);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.getContentPane().setLayout(null);
		frame.setVisible(true);
		frame.setResizable(false);

		label.setFont(new Font("宋体", Font.PLAIN, 20));
		label.setBounds(55, 10, 350, 30);
		frame.getContentPane().add(label);
		result_1.setFont(new Font("宋体", Font.PLAIN, 20));
		result_1.setBounds(55, 190, 350, 30);
		frame.getContentPane().add(result_1);
		result_2.setFont(new Font("宋体", Font.PLAIN, 20));
		result_2.setBounds(55, 255, 350, 30);
		frame.getContentPane().add(result_2);
		
	
		lblA.setFont(new Font("宋体", Font.PLAIN, 20));
		lblA.setBounds(55, 70, 30, 15);
		lblB.setFont(new Font("宋体", Font.PLAIN, 20));
		lblB.setBounds(175, 72, 30, 15);
		lblC.setFont(new Font("宋体", Font.PLAIN, 20));
		lblC.setBounds(295, 70, 30, 15);
		frame.getContentPane().add(lblA);
		frame.getContentPane().add(lblB);
		frame.getContentPane().add(lblC);
		
		lengthOfa.setBounds(95, 65, 70, 25);
		lengthOfb.setBounds(205, 65, 70, 25);
		lengthOfc.setBounds(315, 65, 70, 25);
		lengthOfa.setColumns(10);		
		lengthOfb.setColumns(10);
		lengthOfc.setColumns(10);
		frame.getContentPane().add(lengthOfa);
		frame.getContentPane().add(lengthOfb);
		frame.getContentPane().add(lengthOfc);
		
		calculate.setBounds(115, 130, 95, 25);
		frame.getContentPane().add(calculate);
		clean.setBounds(290, 130, 95, 25);
		frame.getContentPane().add(clean);
		
		calculate.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent arg0){
				if(arg0.getSource()==calculate){
					dis = new Distinguish();
					String[] value = new String[3];
					value[0] = lengthOfa.getText();
					value[1] = lengthOfb.getText();
					value[2] = lengthOfc.getText();
					if(!dis.Validation(value)){//调用验证函数
						JOptionPane.showMessageDialog(null, "输入有误,请重新输入", "错误", JOptionPane.ERROR_MESSAGE);
						allClean();
					}
					else{
						int a = Integer.valueOf(value[0]).intValue();//已验证过不再进行异常处理
						int b = Integer.valueOf(value[1]).intValue();
						int c = Integer.valueOf(value[2]).intValue();
						String triangleType = dis.Triangle(a,b,c);
						result_1.setText("这个三角形是:"+triangleType);
						if(triangleType.equals("边的值不在范围内")||triangleType.equals("不构成三角形")){
							JOptionPane.showMessageDialog(null, "输入有误,请重新输入", "错误", JOptionPane.ERROR_MESSAGE);
							allClean();
						}
						else{
							result_2.setText("面积是:"+dis.TriangleArea(a, b, c)+"     周长是:"+dis.Perimeter(a, b, c));
						}
					}
				}
			}
		});	
		
		clean.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent arg0){
				if(arg0.getSource()==clean){
					 allClean();
				}
			}
		});	
	}
	
	private void allClean(){
		lengthOfa.setText("");
		lengthOfb.setText("");
		lengthOfc.setText("");
		result_1.setText("这个三角形是:");
		result_2.setText("面积是:       周长是:");
	}
}

 程序运行图:

 

posted @ 2017-05-01 16:56  Nothing、  阅读(195)  评论(0编辑  收藏  举报