图像处理 java_java 图像处理小软件（界面+图像处理）

1 /*CJSCalculator.java 2014.8.4 by cjs2 *当点击含有加 的按钮时，则第一排第二个按钮的文本变为加 ；3 *当点击“OK”按钮时，将算出12+2的结果并在第一排最后一个按钮显示；4 *减 ，乘 ，除 的功能类似。其中，数字可以自己输入，也可以固定不变。5 *以上是简单的版本，如果有能力可以设计出更好更完善的计算器。6 **/

7

8 import java.awt.*;9 import javax.swing.*;10 import java.awt.event.*;11 public class CjsCalculator extends JFrame implementsActionListener {12 /*继承Jframe 实现 ActionListener 接口*/

13

14 //协助关闭窗口

15 private class WindowCloser extendsWindowAdapter {16 public voidwindowClosing(WindowEvent we) {17 System.exit(0);18 }19 }20 //strings for operator buttons.

21

22 private String[] str = { “+”, “-“, “*”, “/”, “OK”};23

24 //build buttons.

25

26 JButton[] Obuttons = newJButton[str.length];27 //reset button

28 JButton Rbutton = new JButton(“reset”);29

30 //build textfield to show num and result

31

32 private JTextField display = new JTextField(“0”);33 private JTextField Fnum = new JTextField(“”);34 private JTextField Snum = new JTextField(“”);35 private JTextField Otext = new JTextField(“”);36 private JTextField Deng = new JTextField(“=”);37

38 int i = 0;39

40 //构造函数定义界面

41 publicCjsCalculator() {42

43 Deng.setEditable(false);44 display.setEditable(false);45 Otext.setEditable(false);46 //super 父类47 //super(“Calculator”);48

49 //panel 面板容器

50 JPanel panel1 = new JPanel(new GridLayout(1,5));51 for (i = 0; i

57 JPanel panel2 = new JPanel(new GridLayout(1,5));58 panel2.add(Fnum);59 panel2.add(Otext);60 panel2.add(Snum);61 panel2.add(Deng);62 panel2.add(display);63

64 JPanel panel3 = new JPanel(new GridLayout(1,1));65 panel3.add(Rbutton);66 //初始化容器

67 getContentPane().setLayout(newBorderLayout());68 getContentPane().add(“North”,panel2);69 getContentPane().add(“Center”,panel1);70 getContentPane().add(“South”,panel3);71 //Add listener for Obuttons.

72 for (i = 0; i

75 display.addActionListener(this);76 Rbutton.addActionListener(this);77 setSize(8000,8000);//don’t use /p>

78

79 setVisible(true);//0 //不可改变大小

81 setResizable(false);82 //初始化容器

83 pack();84 }85

86 //实现监听器的performed函数

87 public voidactionPerformed(ActionEvent e) {88 Object happen =e.getSource();89 //90 String label =e.getActionCommand();91

92 if (“+-*/”.indexOf(label) >= 0)93 getOperator(label);94 else if (label == “OK”)95 getEnd(label);96 else if (“reset”.indexOf(label) >= 0)97 //display.setText(“reset”);

98 resetAll(label);99 }100 public voidresetAll(String key) {101 Fnum.setText(“”);102 Snum.setText(“”);103 display.setText(“”);104 Otext.setText(“”);105 }106 public voidgetOperator(String key) {107 Otext.setText(key);108 }109

110 public voidgetEnd(String label) {111 if( (countDot(Fnum.getText()) > 1) || (countDot(Snum.getText())>1) || (Fnum.getText().length()==0) ||

(Snum.getText().length() == 0)) {112     display.setText(“error”);113 }114 else if(checkNum(Fnum.getText())==false || checkNum(Snum.getText())==false){115 display.setText(“error”);116 }117 else{118 double Fnumber =Double.parseDouble(Fnum.getText().trim());119 double Snumber =Double.parseDouble(Snum.getText().trim());120 if (Fnum.getText() != “” && Snum.getText() != “”) {121 if (Otext.getText().indexOf(“+”) >= 0) {122 double CjsEnd = Fnumber +Snumber;123 display.setText(String.valueOf(CjsEnd));124 }125 else if (Otext.getText().indexOf(“-“)>=0) {126 double CjsEnd = Fnumber -Snumber;127 display.setText(String.valueOf(CjsEnd));128 }129 else if (Otext.getText().indexOf(“*”)>=0) {130 double CjsEnd = Fnumber *Snumber;131 display.setText(String.valueOf(CjsEnd));132 }133 else if (Otext.getText().indexOf(“/”)>=0) {134 double CjsEnd = Fnumber /Snumber;135 display.setText(String.valueOf(CjsEnd));136 }137 else

138 display.setText(“error”);139

140 }141 else

142 display.setText(“num is null”);143 }144

145 }146 public intcountDot(String str) {147 int count = 0;148 for (charc:str.toCharArray()) {149 if (c == ‘.’)150 count++;151 }152 returncount;153 }154 public booleancheckNum(String str) {155 boolean tmp = true;156 for (charc:str.toCharArray()) {157 if (Character.isDigit(c) || (c == ‘.’));158 else{159 tmp = false;160 break;161 }162 }163 returntmp;164 }165 public static voidmain(String[] args) {166 newCjsCalculator();167 }168 }

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