本文共 2811 字，大约阅读时间需要 9 分钟。

题目内容

用GUI相应的知识制作科学计算器的面板

源程序及运行结果

package Calr;import java.awt.*;import javax.swing.ButtonGroup;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.JRadioButton;class Cal extends JFrame{
   	private void setNumPanel() {
   		JPanel numpanel1=new JPanel();		numpanel1.setBounds(400,150,290,260);		numpanel1.setLayout(new GridLayout(5,4,5,5));		String [] titles= {
   "MC","MR","MS","M+","←","CE","C","±","7","8","9","/","4","5","6","*","1","2","3","-"};		Button[] buttons1=new Button[20];		for(int i=0;i<20;i++) {
   			buttons1[i]=new Button(titles[i]);			numpanel1.add(buttons1[i]);		}		numpanel1.setVisible(true);			this.add(numpanel1);		JPanel numpanel2=new JPanel();		numpanel2.setBounds(690,150,70,208);		numpanel2.setLayout(new GridLayout(4,1,5,5));		String [] titles2= {
   "M-","√","%","1/x"};		Button[] buttons2=new Button[4];		for(int i=0;i<4;i++) {
   			buttons2[i]=new Button(titles2[i]);		//	buttons2[i].setBackground();			numpanel2.add(buttons2[i]);		}		numpanel2.setVisible(true);		this.add(numpanel2);		Button num0=new Button("0");		num0.setBounds(400, 413, 142, 52);		this.add(num0);		Button nump=new Button(".");		nump.setBounds(545, 413, 70, 52);		this.add(nump);		Button numadd=new Button("+");		numadd.setBounds(619, 413, 70, 52);		this.add(numadd);		Button numequ=new Button("=");		numequ.setBounds(690, 360, 70, 104);		this.add(numequ);	}	private void setAlgNum() {
   		JPanel algpanel=new JPanel();		algpanel.setBounds(20, 204, 360, 260);		algpanel.setLayout(new GridLayout(5,5,5,5));		String [] titles= {
   "","Inv","㏑","(",")","Int","sinh","sin","x²","n!","dms","cosh","cos","xⁿ","ⁿ√x","π","tanh","tan","x³","³√x","F-E","Exp","Mod","㏒","10ⁿ"};		Button[] buttons1=new Button[25];		for(int i=0;i<25;i++) {
   			buttons1[i]=new Button(titles[i]);			algpanel.add(buttons1[i]);		}		algpanel.setVisible(true);		this.add(algpanel);		JPanel radiopanel=new JPanel();		radiopanel.setLayout(new GridLayout(1,3));		JRadioButton angel=new JRadioButton("度");		JRadioButton radian=new JRadioButton("弧度");		JRadioButton grad=new JRadioButton("梯度");		radiopanel.add(angel);		radiopanel.add(radian);		radiopanel.add(grad);		radiopanel.setBounds(20, 150, 360, 52);		radiopanel.setVisible(true);		this.add(radiopanel);	}	private void setText() {
   		JPanel textpanel=new JPanel();		textpanel.setLayout(null);		TextField text=new TextField();		text.setLocation(20, 10);		text.setSize(740,100);		textpanel.setBounds(20,10,740,150);		textpanel.add(text);		textpanel.setVisible(true);		this.add(textpanel);	}	public Cal() {
   		this.setTitle("计算器");		this.setSize(800, 500);		this.setLayout(null);		setNumPanel();		setAlgNum();		setText();		this.setVisible(true);	}}public class Calrtest {
   	public static void main(String[]args) {
   	Cal x=new Cal();	}}

转载地址：http://xerkk.baihongyu.com/