《程序语言综合课程设计》实验报告 - 图文(3)

计算机2011级 程序语言综合课程设计

HandleExp handleExp; HandleOff handleOff; public CalculatorWindow(){

在主类中定义各个组件、方法。主类中通过调用各个方法进行运算： 2、HandleCos方法：实现cos键运算功能： import java.util.LinkedList; import javax.swing.*; import java.awt.event.*;

public class HandleCos implements ActionListener{ LinkedList list;

JTextField resultShow,showComputerProcess; JTextArea saveComputerProcess; HandleCos(LinkedList t1,JTextField t2,

JTextArea t3){ this.list=list; resultShow=t1;

showComputerProcess=t2; saveComputerProcess=t3; }

public void actionPerformed(ActionEvent e){ if(list.size()==1||list.size()==2){ String numOne=list.getFirst();

try{ double x=Double.parseDouble(numOne); double result=Math.cos(x);

String str=String.valueOf(result); list.set(0,str);

resultShow.setText(str);

String proccess=\ showComputerProcess.setText(proccess); saveComputerProcess.append(\\

if(list.size()==2)

list.removeLast(); //移掉运算符号

list,JTextField

8

计算机2011级 程序语言综合课程设计

}

catch(Exception ee){} }

else if(list.size()==3){

String numTwo=list.getLast();

try{ double x=Double.parseDouble(numTwo); double result=Math.cos(x);

String str=String.valueOf(result); list.set(0,str);

resultShow.setText(str);

String proccess=\ showComputerProcess.setText(proccess); saveComputerProcess.append(\\

list.removeLast(); //移掉第2个运算数 list.removeLast(); //移掉运算符号 }

catch(Exception ee){} }

} }

3、help类：实现帮助文档： import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*; import javax.swing.tree.*; import java.io.*;

public class Help implements TreeSelectionListener{

JEditorPane editorPane; public Help() {

JFrame help = new JFrame(\计算器\

Container contentPane = help.getContentPane(); DefaultMutableTreeNode

root

=

new

9

计算机2011级 程序语言综合课程设计

DefaultMutableTreeNode(\帮助\

tree.getSelectionModel().setSelectionMode(TreeSelectio

tree.addTreeSelectionListener(this);

JScrollPane scrollPane1 = new JScrollPane(tree); editorPane = new JEditorPane();

JScrollPane scrollPane2 = new JScrollPane(editorPane); JSplitPane

splitPane

=

new

nModel.SINGLE_TREE_SELECTION);

DefaultMutableTreeNode DefaultMutableTreeNode DefaultMutableTreeNode root.add(t1); root.add(t2); t1.add(t1_1);

JTree tree = new JTree(root);

t1 t1_1 t2

= = =

new new new

DefaultMutableTreeNode(\帮助信息 \DefaultMutableTreeNode(\说明\DefaultMutableTreeNode(\简介\

JSplitPane(JSplitPane.HORIZONTAL_SPLIT,true, scrollPane1, scrollPane2);

}

public void valueChanged(TreeSelectionEvent e) {

JTree tree = (JTree) e.getSource(); DefaultMutableTreeNode

selectionNode

=

contentPane.add(splitPane); help.pack();

help.setBounds(100,50,600,400); help.setVisible(true);

(DefaultMutableTreeNode)

tree.getLastSelectedPathComponent();

String nodeName = selectionNode.toString(); if (selectionNode.isLeaf()) {

String

filepath

=

\

+

10

计算机2011级 程序语言综合课程设计

System.getProperty(\

System.getProperty(\ } }

4、HandleDot类：实现小数点事件： import java.util.LinkedList; import javax.swing.*; import java.awt.event.*;

public class HandleDot implements ActionListener{ LinkedList list;

JTextField resultShow,showComputerProcess; HandleDot(LinkedList t1,JTextField t2){ this.list=list; resultShow=t1;

showComputerProcess=t2; }

public void actionPerformed(ActionEvent e){ String dot=e.getActionCommand(); if(list.size()==1){

String num=list.getFirst(); String s=null;

if(num.indexOf(dot)==-1){ s=num.concat(dot);

list.set(0,s); } else

list,JTextField

}

else editorPane.setText(null); }

try {

editorPane.setPage(filepath); System.out.println(\找不到此文件\} catch (IOException ex) {

11

计算机2011级 程序语言综合课程设计

s=num; list.set(0,s);

resultShow.setText(s);

showComputerProcess.setText(\ }

else if(list.size()==3){ String num=list.getLast(); String s=null;

if(num.indexOf(dot)==-1){ s=num.concat(dot); list.set(2,s); } else s=num;

resultShow.setText(s);

showComputerProcess.setText(\+

\ } } }

5 系统运行及使用说明

1、系统运行结果

采用

eclipse

工具对程序进行编译运行；运行结果：

12