java制作仿win7计算器之一计算器的图形界面的设计

参考一 java仿win7计算器布局

参考二 Swing布局管理器介绍

参考三hw1287789687 大侠的帖子回复

再结合网上各路神人及之前写的博客Swing编程方面步骤,如下:


package calPack;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class Calculator extends JFrame{//自定义类文件,必须继承JFrame框架
	//定义组件
	
	JMenuBar jmb;
	JMenu[] jm;
	JMenuItem[] jmi;
	JTextField jtf;
	JButton[] jb;
	
	public static void main(String[] args)// 添加主函数,并调用类的构造函数
	{
		new Calculator();
	}
	
	public Calculator()//添加构造函数
	{
		//创建组件
				
		jmb = new JMenuBar();
		jm = new JMenu[3];
		
		jm[0] = new JMenu("查看(V)");
		jm[1] = new JMenu("编辑(E)");
		jm[2] = new JMenu("帮助(H)");
		
		jmi = new JMenuItem[4];
		jmi[0] = new JMenuItem("标准型(T)");
		jmi[1] = new JMenuItem("复制(C)");
		jmi[2] = new JMenuItem("粘贴(P)");
		jmi[3] = new JMenuItem("关于(A)");
		
		jtf = new JTextField("0");
		
		jb = new JButton[28];
		jb[0] = new JButton("MC");
		jb[1] = new JButton("MR");
		jb[2] = new JButton("MS");
		jb[3] = new JButton("M+");
		jb[4] = new JButton("M-");
		jb[5] = new JButton("Backspace");
		jb[6] = new JButton("CE");
		jb[7] = new JButton("C");
		jb[8] = new JButton("+/-");
		jb[9] = new JButton("sqrt");
		jb[10] = new JButton("7");
		jb[11] = new JButton("8");
		jb[12] = new JButton("9");
		jb[13] = new JButton("/");
		jb[14] = new JButton("%");
		jb[15] = new JButton("4");
		jb[16] = new JButton("5");
		jb[17] = new JButton("6");
		jb[18] = new JButton("*");
		jb[19] = new JButton("1/x");
		jb[20] = new JButton("1");
		jb[21] = new JButton("2");
		jb[22] = new JButton("3");
		jb[23] = new JButton("-");
		jb[24] = new JButton("=");
		jb[25] = new JButton("0");
		jb[26] = new JButton(".");
		jb[27] = new JButton("+");
		
		initGUI();//设置布局,添加组件
		
		//设置窗口属性
		this.setTitle("使用java制作的简易计算器By毛二");//基础属性
		this.setIconImage(new ImageIcon("熊猫.jpg").getImage());//设置窗口标题
		this.setSize(400,250);//设置大小,按像素
		this.setLocation(200,200);//设置初始位置,默认是屏幕最左上角
		this.setVisible(true);//让它显示,位置可变
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置默认到关闭操作,不然java虚拟机还没也关闭
	}
	
	//设置布局。
	private void initGUI() {
		
		this.setJMenuBar(jmb);
		jmb.add(jm[0]);
		jmb.add(jm[1]);
		jmb.add(jm[2]);
		
		jm[0].add(jmi[0]);
		jm[1].add(jmi[1]);
		jm[1].add(jmi[2]);
		jm[2].add(jmi[3]);
		
				
		jtf.setEditable(false);//文本框不可编辑
		
		GridBagLayout gridbag = new GridBagLayout();
		GridBagConstraints c = new GridBagConstraints();
		setLayout(gridbag);
				
		c.weightx = 0.01;//容器上的计算器各个部件成一个布局,这个参数,可以把容器和窗体合二为一,不会出现窗体过大而容器还留有空隙
		c.weighty = 0.01;
		c.fill = GridBagConstraints.BOTH;
		
		//文本框
		c.gridx = 0;
		c.gridy = 0;
		c.gridwidth = 5;
		c.gridheight = 2;
		add(jtf,c);
		
		//MC
		c.gridx = 0; 
		c.gridy = 2; 
		c.gridwidth = 1; // 横占一个单元格
		c.gridheight = 1; // 列占一个单元格
		addButton(jb[0],gridbag,c);//添加按钮到面板布局
		//MR
		c.gridx = 1; //换行,放置组件,只需要修改行的参数就行,其他参数暂时不变。
		addButton(jb[1],gridbag,c);
		//MS
		c.gridx = 2; 
		addButton(jb[2],gridbag,c);
		//M+
		c.gridx = 3; 
		addButton(jb[3],gridbag,c);
		//M-
		c.gridx = 4; 
		addButton(jb[4],gridbag,c);
	
		//Backspace
		c.gridx = 0; 
		c.gridy = 3; 
		addButton(jb[5],gridbag,c);
		//CE
		c.gridx = 1; 
		addButton(jb[6],gridbag,c);
		//C
		c.gridx = 2; 
		addButton(jb[7],gridbag,c);
		//+/-
		c.gridx = 3; 
		addButton(jb[8],gridbag,c);
		//Sqrt
		c.gridx = 4;		
		addButton(jb[9],gridbag,c);
		
		//7
		c.gridx = 0; 
		c.gridy = 4; 
		addButton(jb[10],gridbag,c);
		//8
		c.gridx = 1; 
		addButton(jb[11],gridbag,c);
		//9
		c.gridx = 2; 
		addButton(jb[12],gridbag,c);
		///
		c.gridx = 3; 
		addButton(jb[13],gridbag,c);
		//%
		c.gridx = 4; 
		addButton(jb[14],gridbag,c);
		
		//4
		c.gridx = 0; 
		c.gridy = 5; 
		addButton(jb[15],gridbag,c);
		//5
		c.gridx = 1; 
		addButton(jb[16],gridbag,c);
		//6
		c.gridx = 2; 
		addButton(jb[17],gridbag,c);
		//*
		c.gridx = 3; 
		addButton(jb[18],gridbag,c);
		//1/x
		c.gridx = 4;
		addButton(jb[19],gridbag,c);
		
		//1
		c.gridx = 0;
		c.gridy = 6; 
		addButton(jb[20],gridbag,c);
		//2
		c.gridx = 1;
		addButton(jb[21],gridbag,c);
		//3
		c.gridx = 2;
		addButton(jb[22],gridbag,c);
		//-
		c.gridx = 3;
		addButton(jb[23],gridbag,c);
		//=
		c.gridx = 4;
		c.gridy = 6; 
		c.gridheight = 2; //重新设置列,列占二个单元格
		addButton(jb[24],gridbag,c);
		
		//0
		c.gridx = 0;
		c.gridy = 7; 
		c.gridwidth = 2; // 重新设置横,横占二个单元格
		c.gridheight = 1; // 恢复列,列占一个单元格
		addButton(jb[25],gridbag,c);
		//.
		c.gridx = 2;
		c.gridwidth = 1; // 恢复横,横占一个单元格
		addButton(jb[26],gridbag,c);
		//+
		c.gridx = 3;
		addButton(jb[27],gridbag,c);
	}
	//添加按钮到面板布局
	private void addButton(JButton jButton, GridBagLayout gridbag,
			GridBagConstraints c) {
		gridbag.setConstraints(jButton, c);
		add(jButton);
	}
}

效果如下:

java制作仿win7计算器之一计算器的图形界面的设计_第1张图片




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