想做一个JAVA简单的计算器 不知道怎么设计布局

[yulunlean]

用SWING设计布局 具体怎么布局？
谁能讲解一下

[GoGo1102]

用GridLayout布局试试

[Dan1980]

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

public class Calculator extends JFrame implements ActionListener {
	
	char[] buttonLabels = {'7', '8', '9', '+', '4', '5', '6', '-', '1', '2', '3', '*', '0', '.', '=', '/'};
	JTextField output;
	
	public Calculator() {
		super("计算器");
		
		JPanel main = new JPanel() { public Insets getInsets() { return new Insets(4, 4, 4, 4); } };
		main.setLayout(new BorderLayout(4, 4));
		
		// 上半部分
		JPanel top = new JPanel();
		top.setLayout(new BorderLayout(4, 4));
		output = new JTextField();
		output.setHorizontalAlignment(JTextField.RIGHT);
		JButton clear = new JButton("C");
		clear.addActionListener(this);
		top.add(output, BorderLayout.CENTER);
		top.add(clear, BorderLayout.EAST);
		main.add(top, BorderLayout.NORTH);
		
		// 下半部分
		JPanel bottom = new JPanel();
		bottom.setLayout(new GridLayout(4, 4, 4, 4));
		for (int i=0; i<buttonLabels.length; i++) {
			JButton btn = new JButton(Character.toString(buttonLabels[i]));
			btn.addActionListener(this);
			bottom.add(btn);
		}
		main.add(bottom, BorderLayout.CENTER);
		
		setContentPane(main);
		pack();
		setResizable(false);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
	
	public void actionPerformed(ActionEvent e) {
		char c = ((JButton)e.getSource()).getText().charAt(0);
		if (c == 'C') output.setText("");
		else output.setText(output.getText() + c);
	}
	
	public static void main(String[] args) {
		new Calculator().setVisible(true);
	}
}

[wuy13862574600]

一个简单的布局n简单，注意一些小细节就有点麻烦。。
主要的还是事件的响应的处理了。

[Dan1980]

布局管理器基本上都是awt的，swing添加了一些新的，但主要还是靠awt。
计算器可以用BorderLayout和GridLayout结合，外层用BorderLayout，数字键盘用GridLayout。自己试试吧，有了问题再来问。

[marryhong]

计算器布局来了!~ 我主要用的是空布局 因为自己能控制,流式布局不好控制位置!~

/**
 * @(#)JiSuanQi.java
 *空布局计算器
 *
 * @author 
 * @version 1.00 2007/10/24
 */
 import javax.swing.*;
 import java.awt.*;
 import java.awt.event.*;
public class JiSuanQi extends JFrame{
	JTextField t=new JTextField(20);
	JButton[] b=new JButton[27];
	String[] s={"Backspace","CE","C",
				"MC","7","8","9","/","sqlt",
				"MR","4","5","6","*","%",
				"MS","1","2","3","-","1/x",
				"M+","0","+/-",".","+","="
				};
	
    public JiSuanQi() {
    	
    	this.setLayout(null);
    	this.add(t);
    	t.setBounds(10,10,400,20);
    	
    	for(int i=0;i<27;i++){
    		b[i]=new JButton(s[i]);
    		b[i].addActionListener(new AAA());//注册监听
    		this.add(b[i]);
       	}
       	
       	for(int i=0;i<3;i++){
       		b[i].setBounds(90+(60+50)*i,40,100,20);
       	}
       	
       	int n=3;
       	for(int i=0;i<4;i++){
       		for(int j=0;j<6;j++){
       			if((n-3)%6==0){
       				b[n].setBounds(10,70+(25+5)*i,60,25);
       			}else{
       				b[n].setBounds(90+(60+5)*(j-1),70+(25+5)*i,60,25);
       			}
       			n++;
       		}
       	}
       	
       	this.setSize(425,240);
       	this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    	this.setVisible(true);
    }
    
    public static void main(String[] args) {
    	new JiSuanQi();
    }
}
//监听，实现监听
class AAA implements ActionListener{
	public void actionPerformed(ActionEvent e){
		Object obj=e.getSource();
		System.out.println(obj.toString());
	}
}

[yang_zhenghua]

//运行不了
Exception in thread "main" java.lang.UnsatisfiedLinkError: getCreatedFontHandle
at sun.font.FontManager.getCreatedFontHandle(Native Method)
at sun.font.FontManager.setSameHandle(FontManager.java:429)
at javax.swing.plaf.FontUIResource.<init>(FontUIResource.java:42)
at javax.swing.plaf.metal.DefaultMetalTheme$FontDelegate.getFont(DefaultMetalTheme.java:230)
at javax.swing.plaf.metal.DefaultMetalTheme.getFont(DefaultMetalTheme.java:184)
at javax.swing.plaf.metal.DefaultMetalTheme.getUserTextFont(DefaultMetalTheme.java:168)
at javax.swing.plaf.metal.MetalLookAndFeel$FontActiveValue.createValue(MetalLookAndFeel.java:1684)
at javax.swing.UIDefaults.getFromHashtable(UIDefaults.java:200)
at javax.swing.UIDefaults.get(UIDefaults.java:130)
at javax.swing.MultiUIDefaults.get(MultiUIDefaults.java:44)
at javax.swing.UIDefaults.getFont(UIDefaults.java:350)
at javax.swing.UIManager.getFont(UIManager.java:567)
at javax.swing.plaf.basic.BasicTextUI.installDefaults(BasicTextUI.java:217)
at javax.swing.plaf.basic.BasicTextUI.installUI(BasicTextUI.java:682)
at javax.swing.plaf.basic.BasicTextFieldUI.installUI(BasicTextFieldUI.java:57)
at javax.swing.JComponent.setUI(JComponent.java:653)
at javax.swing.text.JTextComponent.setUI(JTextComponent.java:298)
at javax.swing.text.JTextComponent.updateUI(JTextComponent.java:308)
at javax.swing.text.JTextComponent.<init>(JTextComponent.java:282)
at javax.swing.JTextField.<init>(JTextField.java:207)
at javax.swing.JTextField.<init>(JTextField.java:174)
at JiSuanQi.<init>(JiSuanQi.java:12)
at JiSuanQi.main(JiSuanQi.java:55)

[dylloveyou]

可以仿照windows自带的计算器，功能不必那么强就行。

[qkhhxkj102]

要是我
还是用 BorderLayout 自己写,写多了就会知道怎么好写的
可以先从简单的布局开始,我以前也是这样的呀,现在也可以自己写了,太复杂的,可以想一下可不可以换一种设计的方法
我想没有必要跟自己过不去

[marryhong]

我上面写的没有功能 只有布局实现 具体功能还要自己加进去!~ 我的能运行出来啊!~

/**
 * @(#)JiSuanQi.java
 *空布局计算器
 *
 * @author 
 * @version 1.00 2007/10/24
 */
 import javax.swing.*;
 import java.awt.*;
 import java.awt.event.*;
public class JiSuanQi extends JFrame{
	JTextField t=new JTextField(20);
	JButton[] b=new JButton[27];
	String[] s={"Backspace","CE","C",
				"MC","7","8","9","/","sqlt",
				"MR","4","5","6","*","%",
				"MS","1","2","3","-","1/x",
				"M+","0","+/-",".","+","="
				};
	
    public JiSuanQi() {
    	
    	this.setLayout(null);
    	this.add(t);
    	t.setBounds(10,10,400,20);
    	
    	for(int i=0;i<27;i++){
    		b[i]=new JButton(s[i]);
    		b[i].addActionListener(new AAA());//注册监听
    		this.add(b[i]);
       	}
       	
       	for(int i=0;i<3;i++){
       		b[i].setBounds(90+(60+50)*i,40,100,20);
       	}
       	
       	int n=3;
       	for(int i=0;i<4;i++){
       		for(int j=0;j<6;j++){
       			if((n-3)%6==0){
       				b[n].setBounds(10,70+(25+5)*i,60,25);
       			}else{
       				b[n].setBounds(90+(60+5)*(j-1),70+(25+5)*i,60,25);
       			}
       			n++;
       		}
       	}
       	
       	this.setSize(425,240);
       	this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    	this.setVisible(true);
    }
    
    public static void main(String[] args) {
    	new JiSuanQi();
    }
}
//监听，实现监听
class AAA implements ActionListener{
	public void actionPerformed(ActionEvent e){
		Object obj=e.getSource();
		System.out.println(obj.toString());
	}
}

[yulunlean]

是这样布局吗

[power_115]

学习.对于自己来说要加强对AWT的理解与编程.谢谢楼主跟我学习的机会