第4次作业类测试代码+085
一、类图设计如下
二、界面如下
功能演示
1、输入错误
2、不构成三角形
3、一般三角形
面积默认保留两位小数
4、直角三角形
5、等腰三角形
6、等边三角形
7、cancel演示
防止程序崩溃，默认重置为0
三、代码部分
1、Triangle类
1 package visualTriangle; 2 3 public class Triangle { 4 5 //judge the fields 6 public static boolean Check(int num) 7 { 8 if(num<1 || num>100) 9 { 10 return false; 11 } 12 return true; 13 } 14 15 //judge shape 16 public static String triangle(int side1,int side2,int side3) 17 { 18 int temp; 19 if(side1>side2) 20 {temp=side1;side1=side2;side2=temp;} 21 if(side2>side3) 22 {temp=side2;side2=side3;side3=temp;} 23 24 String result="三角形"; 25 if(side1+side2<=side3) 26 return "不构成"+result; 27 else if(side1==side2 && side2==side3) 28 return "等边"+result; 29 else if(side1==side2 || side2==side3 || side1==side3) 30 return "等腰"+result; 31 else if(side1*side1+side2*side2==side3*side3) 32 return "直角"+result; 33 else 34 return "普通"+result; 35 } 36 37 //calculate Area 38 public static float triangleArea(int side1,int side2,int side3) 39 { 40 double p=(side1+side2+side3)*0.5; 41 return (float)Math.sqrt(p*(p-side1)*(p-side2)*(p-side3)); 42 } 43 //calculate Grith 44 public static int perimeter(int side1,int side2,int side3) 45 { 46 return side1+side2+side3; 47 } 48 }
2、TriangleUI类
package visualTriangle; import java.awt.Color; import java.awt.Font; import java.awt.FontFormatException; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.text.DecimalFormat; import javax.management.relation.RelationNotification; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JTextField; public class TriangleUI { public static void initUI() { JFrame frame = new JFrame("Triangle"); frame.setLayout(null); //labels JLabel title = new JLabel("请输入三角形的三条边:"); JLabel lSide1 = new JLabel("a:"); JLabel lSide2 = new JLabel("b:"); JLabel lSide3 = new JLabel("c:"); JLabel lShape = new JLabel("这个三角形是:"); JLabel lArea = new JLabel("面积是:"); JLabel lGrith = new JLabel("周长是:"); //input test fields JTextField tSide1 = new JTextField(); JTextField tSide2 = new JTextField(); JTextField tSide3 = new JTextField(); JTextField tShape = new JTextField(); JTextField tArea = new JTextField(); JTextField tGrith = new JTextField(); //buttons JButton bSubmit = new JButton("Ok"); JButton bCancel = new JButton("Cancel"); //ok listener bSubmit.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { if(e.getSource()==bSubmit) { int side1=Integer.parseInt(tSide1.getText()); int side2=Integer.parseInt(tSide2.getText()); int side3=Integer.parseInt(tSide3.getText()); if(Triangle.Check(side1) && Triangle.Check(side2) && Triangle.Check(side3)) { String re=Triangle.triangle(side1, side2, side3); tShape.setText(re); if("不构成三角形".equals(re)) { tArea.setText("无"); tGrith.setText("无"); } else { float area=Triangle.triangleArea(side1, side2, side3); DecimalFormat df = new DecimalFormat("#.00"); tArea.setText(df.format(area)); tGrith.setText(""+Triangle.perimeter(side1, side2, side3)); } } else { JOptionPane.showMessageDialog(null, "输入有误，请重请输入正确整数"); tSide1.setText("0"); tSide2.setText("0"); tSide3.setText("0"); } } } }); //cancel listener bCancel.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { if(e.getSource()==bCancel) { tSide1.setText("0"); tSide2.setText("0"); tSide3.setText("0"); tShape.setText(""); tArea.setText(""); tGrith.setText(""); } } }); Font ft = new Font("宋体",Font.BOLD,24); //labels settings title.setFont(ft); title.setBounds(62, 62, 500, 25); lSide1.setFont(ft); lSide1.setBounds(80, 124, 50, 25); lSide2.setFont(ft); lSide2.setBounds(230, 124, 50, 25); lSide3.setFont(ft); lSide3.setBounds(380, 124, 50, 25); lShape.setFont(ft); lShape.setBounds(62, 248, 200, 25); lArea.setFont(ft); lArea.setBounds(62, 310, 150, 25); lGrith.setFont(ft); lGrith.setBounds(270, 310, 150, 25); //textFileds settings tSide1.setBounds(130, 124, 50, 25); tSide2.setBounds(280, 124, 50, 25); tSide3.setBounds(430, 124, 50, 25); tShape.setBounds(230, 248, 150, 25); tShape.setFont(ft); tShape.setEnabled(false); tArea.setBounds(150, 310, 100, 25); tArea.setFont(ft); tArea.setEnabled(false); tGrith.setBounds(360, 310, 100, 25); tGrith.setFont(ft); tGrith.setEnabled(false); //button settings bSubmit.setBounds(180, 187, 80, 31); bCancel.setBounds(320, 187, 80, 31); //add to frame frame.add(title); frame.add(lSide1);frame.add(lSide2);frame.add(lSide3); frame.add(tSide1);frame.add(tSide2);frame.add(tSide3); frame.add(bSubmit);frame.add(bCancel); frame.add(lShape);frame.add(tShape); frame.add(lArea);frame.add(tArea); frame.add(lGrith);frame.add(tGrith); //frame configures frame.setSize(600, 490); frame.setLocation(300,300); frame.setVisible(true); } }
1 package visualTriangle; 2 3 import java.awt.Color; 4 import java.awt.Font; 5 import java.awt.FontFormatException; 6 import java.awt.GridLayout; 7 import java.awt.event.ActionEvent; 8 import java.awt.event.ActionListener; 9 import java.text.DecimalFormat; 10 11 import javax.management.relation.RelationNotification; 12 import javax.swing.JButton; 13 import javax.swing.JFrame; 14 import javax.swing.JLabel; 15 import javax.swing.JOptionPane; 16 import javax.swing.JTextField; 17 18 public class TriangleUI { 19 20 public static void initUI() { 21 JFrame frame = new JFrame("Triangle"); 22 frame.setLayout(null); 23 //labels 24 JLabel title = new JLabel("请输入三角形的三条边:"); 25 JLabel lSide1 = new JLabel("a:"); 26 JLabel lSide2 = new JLabel("b:"); 27 JLabel lSide3 = new JLabel("c:"); 28 JLabel lShape = new JLabel("这个三角形是:"); 29 JLabel lArea = new JLabel("面积是:"); 30 JLabel lGrith = new JLabel("周长是:"); 31 //input test fields 32 JTextField tSide1 = new JTextField(); 33 JTextField tSide2 = new JTextField(); 34 JTextField tSide3 = new JTextField(); 35 JTextField tShape = new JTextField(); 36 JTextField tArea = new JTextField(); 37 JTextField tGrith = new JTextField(); 38 //buttons 39 JButton bSubmit = new JButton("Ok"); 40 JButton bCancel = new JButton("Cancel"); 41 //ok listener 42 bSubmit.addActionListener(new ActionListener() 43 { 44 @Override 45 public void actionPerformed(ActionEvent e) 46 { 47 if(e.getSource()==bSubmit) 48 { 49 int side1=Integer.parseInt(tSide1.getText()); 50 int side2=Integer.parseInt(tSide2.getText()); 51 int side3=Integer.parseInt(tSide3.getText()); 52 53 if(Triangle.Check(side1) && Triangle.Check(side2) && Triangle.Check(side3)) 54 { 55 String re=Triangle.triangle(side1, side2, side3); 56 tShape.setText(re); 57 if("不构成三角形".equals(re)) 58 { 59 tArea.setText("无"); 60 tGrith.setText("无"); 61 } 62 else 63 { 64 float area=Triangle.triangleArea(side1, side2, side3); 65 DecimalFormat df = new DecimalFormat("#.00"); 66 tArea.setText(df.format(area)); 67 tGrith.setText(""+Triangle.perimeter(side1, side2, side3)); 68 } 69 } 70 else 71 { 72 JOptionPane.showMessageDialog(null, "输入有误，请重请输入正确整数"); 73 tSide1.setText("0"); 74 tSide2.setText("0"); 75 tSide3.setText("0"); 76 } 77 } 78 } 79 }); 80 //cancel listener 81 bCancel.addActionListener(new ActionListener() 82 { 83 @Override 84 public void actionPerformed(ActionEvent e) 85 { 86 if(e.getSource()==bCancel) 87 { 88 tSide1.setText("0"); 89 tSide2.setText("0"); 90 tSide3.setText("0"); 91 tShape.setText(""); 92 tArea.setText(""); 93 tGrith.setText(""); 94 } 95 96 } 97 }); 98 99 Font ft = new Font("宋体",Font.BOLD,24); 100 //labels settings 101 title.setFont(ft); 102 title.setBounds(62, 62, 500, 25); 103 lSide1.setFont(ft); 104 lSide1.setBounds(80, 124, 50, 25); 105 lSide2.setFont(ft); 106 lSide2.setBounds(230, 124, 50, 25); 107 lSide3.setFont(ft); 108 lSide3.setBounds(380, 124, 50, 25); 109 lShape.setFont(ft); 110 lShape.setBounds(62, 248, 200, 25); 111 lArea.setFont(ft); 112 lArea.setBounds(62, 310, 150, 25); 113 lGrith.setFont(ft); 114 lGrith.setBounds(270, 310, 150, 25); 115 116 //textFileds settings 117 tSide1.setBounds(130, 124, 50, 25); 118 tSide2.setBounds(280, 124, 50, 25); 119 tSide3.setBounds(430, 124, 50, 25); 120 tShape.setBounds(230, 248, 150, 25); 121 tShape.setFont(ft); 122 tShape.setEnabled(false); 123 tArea.setBounds(150, 310, 100, 25); 124 tArea.setFont(ft); 125 tArea.setEnabled(false); 126 tGrith.setBounds(360, 310, 100, 25); 127 tGrith.setFont(ft); 128 tGrith.setEnabled(false); 129 //button settings 130 bSubmit.setBounds(180, 187, 80, 31); 131 bCancel.setBounds(320, 187, 80, 31); 132 //add to frame 133 frame.add(title); 134 frame.add(lSide1);frame.add(lSide2);frame.add(lSide3); 135 frame.add(tSide1);frame.add(tSide2);frame.add(tSide3); 136 frame.add(bSubmit);frame.add(bCancel); 137 frame.add(lShape);frame.add(tShape); 138 frame.add(lArea);frame.add(tArea); 139 frame.add(lGrith);frame.add(tGrith); 140 //frame configures 141 frame.setSize(600, 490); 142 frame.setLocation(300,300); 143 frame.setVisible(true); 144 } 145 146 }
