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資源簡介

JAVA WindowBuilder 制作的簡易粗暴的計算器，適合初學者。 package 計算器; import java.awt.BorderLayout; import java.awt.EventQueue; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.util.regex.Matcher; import java.util.regex.Pattern; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JTextField; import javax.swing.border.EmptyBorder; import javax.swing.GroupLayout; import javax.swing.GroupLayout.Alignment; import javax.swing.LayoutStyle.ComponentPlacement; public class 計算器5 extends JFrame { private JPanel contentPane; private JTextField textField; private double v1, v2, value; private char operator; private boolean reop = false; /** * Launch the application. */ public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { try { 計算器5 frame = new 計算器5(); frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); }

資源截圖

代碼片段和文件信息 

package?計算器;

import?java.awt.BorderLayout;
import?java.awt.EventQueue;
import?java.awt.event.ActionEvent;
import?java.awt.event.ActionListener;
import?java.awt.event.KeyAdapter;
import?java.awt.event.KeyEvent;
import?java.util.regex.Matcher;
import?java.util.regex.Pattern;

import?javax.swing.JButton;
import?javax.swing.Jframe;
import?javax.swing.JPanel;
import?javax.swing.JTextField;
import?javax.swing.border.EmptyBorder;
import?javax.swing.GroupLayout;
import?javax.swing.GroupLayout.Alignment;
import?javax.swing.Layoutstyle.ComponentPlacement;

public?class?計算器5?extends?Jframe?{

	private?JPanel?contentPane;
	private?JTextField?textField;
????private?double?v1?v2?value;
????private?char?operator;
????private?boolean?reop?=?false;
????

	/**
	?*?Launch?the?application.
	?*/
	public?static?void?main（String[]?args）?{
		EventQueue.invokeLater（new?Runnable（）?{
			public?void?run（）?{
				try?{
					計算器5?frame?=?new?計算器5（）;
					frame.setVisible（true）;
				}?catch?（Exception?e）?{
					e.printStackTrace（）;
				}
			}
		}）;
	}
	public?static?int?getSubCount_2（String?str?String?key）?{
????????int?count?=?0;
????????int?index?=?0;
????????while?（（index?=?str.indexOf（key?index））?!=?-1）?{
????????????index?=?index?+?key.length（）;

????????????count++;
????????}
????????return?count;
????}
	/**
	?*?Create?the?frame.
	?*/
	public?計算器5（）?{
		setResizable（false）;
	
		
		JButton?button_4?=?new?JButton（“0“）;
		button_4.addActionListener（new?ActionListener（）?{
			public?void?actionPerformed（ActionEvent?e）?{
				
				if（reop?==true&&oo==1）?textField.setText（““）;
				if（（textField.getText（）.indexOf（‘0‘）==-1||textField.getText（）.charAt（0）!=‘0‘||textField.getText（）.indexOf（‘0‘）				String?text?=?textField.getText（）?+‘0‘;
????????????????textField.setText（text）;oo=0;
????????????????}
				
			}
		}）;
		
		JButton?btnNewButton?=?new?JButton（“7“）;
		btnNewButton.addActionListener（new?ActionListener（）?{
			public?void?actionPerformed（ActionEvent?e）?{
				if（reop?==true&&oo==1）textField.setText（““）;
				String?text?=?textField.getText（）?+‘7‘;
????????????????textField.setText（text）;oo=0;
			}
		}）;
		
		JButton?btnNewButton_1?=?new?JButton（“4“）;
		btnNewButton_1.addActionListener（new?ActionListener（）?{
			public?void?actionPerformed（ActionEvent?e）?{
				if（reop?==true&&oo==1）textField.setText（““）;
				String?text?=?textField.getText（）?+‘4‘;
????????????????textField.setText（text）;oo=0;
			}
		}）;
		
		JButton?btnNewButton_2?=?new?JButton（“1“）;
		btnNewButton_2.addActionListener（new?ActionListener（）?{
			public?void?actionPerformed（ActionEvent?e）?{
				if（reop?==true&&oo==1）textField.setText（““）;
				String?text?=?textField.getText（）?+‘1‘;
????????????????textField.setText（text）;oo=0;
			}
		}）;
		
		JButton?btnNewButton_3?=?new?JButton（“8“）;
		btnNewButton_3.addActionListener（new?ActionListener（）?{
		
			public?void?actionPerformed（ActionEvent?e）?{
				if（reop?==true&&oo==1）textField.setText（““）;
				String?text?=?textField.getText

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