各位长者请指点一下

[Jimlyli]

import javax.swing.*;
import java.awt.event.*;
import java.awt.Container;
import java.awt.GridLayout;
import java.text.DecimalFormat;
public class Yuan extends JFrame {
private JLabel zuobiaoL1,zuobiaoL2,distanceL;
private JLabel radiusL,circumferenceL,areaL;

private JTextField zuobiaoTF1,zuobiaoTF2;
private JTextField distanceTF,radiusTF,circumferenceTF,areaTF;
private JButton distanceB,radiusB,circumferenceB,areaB,calculateB,exitB;

/* private DistanceButtonHandler disHandler;
private RadiusButtonHandler radHandler;
private CircumferenceButtonHandler cirHandler;
private AreaButtonHandler areHandler;
*/private CalculateButtonHandler calHandler;
private ExitButtonHandler exiHandler;

public static final double PAI=3.1416;
private static final int WIDTH=400;
private static final int HIGHT=1200;

public Yuan(){
zuobiaoL1=new JLabel("坐标1",SwingConstants.RIGHT);
zuobiaoL2=new JLabel("做标2",SwingConstants.RIGHT);
distanceL=new JLabel("distance",SwingConstants.RIGHT);
radiusL=new JLabel("radius",SwingConstants.RIGHT);
circumferenceL=new JLabel("circumference",SwingConstants.RIGHT);
areaL=new JLabel("area",SwingConstants.RIGHT);

zuobiaoTF1=new JTextField(10);
zuobiaoTF2=new JTextField(10);
distanceTF=new JTextField(10);
radiusTF=new JTextField(10);
circumferenceTF=new JTextField(10);
areaTF=new JTextField(10);
/* distance=new JButton("distance");
disHandler=new DistanceButtonHandler();
distance.addActionListener(disHandler);

radius=new JButton("radius");
radHandler=new RadiusButtonHandler();
radius.addActionListener(radHandler);

circumference=new JButton("circumference");
cirHandler=new CircumferenceButtonHandler();
circumference.addActionListener(cirHandler);

area=new JButton("area");
areHandler=new AreButtonHandler();
area.addActionListener(areHandler);
*/
calculateB=new JButton("calculate");
calHandler=new CalculateButtonHandler();
calculateB.addActionListener(calHandler);

exitB=new JButton("exit");
exiHandler=new ExitButtonHandler();
exitB.addActionListener(exiHandler);

setTitle("Yuan");
Container pane=getContentPane();
pane.setLayout(new GridLayout(7,2));

pane.add(zuobiaoL1);
pane.add(zuobiaoTF1);
pane.add(zuobiaoL2);
pane.add(zuobiaoTF2);
pane.add(distanceL);
pane.add(distanceTF);
pane.add(radiusL);
pane.add(radiusTF);
pane.add(circumferenceL);
pane.add(circumferenceTF);
pane.add(areaL);
pane.add(areaTF);
pane.add(calculateB);
pane.add(exitB);

setSize(WIDTH,HIGHT);
setVisible(true);
setDefaultCloseOperation(EXIT_ON_CLOSE);

}
public class CalculateButtonHandler implements ActionListener{
public void actionPerformed(ActionEvent e){
Piont zuobiao1,zuobiao2;
zuobiao1=new Piont(zuobiaoTF1.getText());

zuobiao2=new Piont(zuobiaoTF2.getText());
double d=distance(zuobiao1,zuobiao2);
double r=radius(d);
distanceTF.setText(valueOf(d));
radiusTF.setText(valueOf(radius(d)));
areaTF.setText(""+area(r));
circumferenceTF.setText(""+circumference(r));

}
}
public class ExitButtonHandler implements ActionListener{
public void actionPerformed(ActionEvent e){
System.exit(0);
}
}
public class Piont {
double x,y;
Piont(double X , double Y) {
x = X ;
y = Y ;
}
public static double distance(Piont a ,Piont b) {
double x1=a.x;
double y1=a.y;
double x2=b.x;
double y2=b.y;
double aa=Math.pow(x1-x2,2)+Math.pow(y1-y2,2);
double d=Math.sqrt(aa);
return d;
}
public double radius(double d) {
return (d/2);
}
public double circumference(double r){
return(2*PAI*r);
}
public double area(double r){
return(PAI*r*r);
}
public void main(String[] args){

}
}
}

[poFate]

我真得指点你一下！！
大哥你有啥问题你说清楚啊

[xiaohuanjie]

[Jimlyli]

调试时出错，如何改正。还有自己写的Piont类中的方法中不能用static，一用就出错；

[poFate]

因为你的point是内部类，内部类是不能有static方法的
我想问一下，你把这些类都包含在一个类里面，是你源代码就这样 还是你修理过的

[ZangXT]

Piont可以写成static内部类。public static class Piont
或者直接提取到Test类之外。

先自己找一下语法错误再谈调试。

[Jimlyli]

我想问一下如何用强制转换把这语句zuobiao1=new Piont(zuobiaoTF1.getText());修正
还有 zuobiao2=new Piont(zuobiaoTF2.getText());
double d=distance(zuobiao1,zuobiao2);
double r=radius(d);
distanceTF.setText(valueOf(d));
radiusTF.setText(valueOf(radius(d)));
areaTF.setText(""+area(r));
circumferenceTF.setText(""+circumference(r));
这些方法都出错，如何修正。
Thanks

[ZangXT]

1.Piont有Piont（String str）这样的构造方法吗？
2.distance这些方法谁定义的，方法调用语法？

[ZangXT]

import javax.swing.*;
import java.awt.event.*;
import java.awt.Container;
import java.awt.GridLayout;
import java.text.DecimalFormat;

public class Test extends JFrame {

    private JLabel zuobiaoL1, zuobiaoL2, distanceL;
    private JLabel radiusL, circumferenceL, areaL;
    private JTextField zuobiaoTF1, zuobiaoTF2;
    private JTextField distanceTF, radiusTF, circumferenceTF, areaTF;
    private JButton distanceB, radiusB, circumferenceB, areaB, calculateB, exitB;
    /* private DistanceButtonHandler disHandler;
    private RadiusButtonHandler radHandler;
    private CircumferenceButtonHandler cirHandler;
    private AreaButtonHandler areHandler;
     */
    private CalculateButtonHandler calHandler;
    private ExitButtonHandler exiHandler;
    public static final double PAI = 3.1416;
    private static final int WIDTH = 400;
    private static final int HIGHT = 1200;

    public static void main(String[] args) {
        new Test();
    }

    public Test() {
        zuobiaoL1 = new JLabel("坐标1", SwingConstants.RIGHT);
        zuobiaoL2 = new JLabel("做标2", SwingConstants.RIGHT);
        distanceL = new JLabel("distance", SwingConstants.RIGHT);
        radiusL = new JLabel("radius", SwingConstants.RIGHT);
        circumferenceL = new JLabel("circumference", SwingConstants.RIGHT);
        areaL = new JLabel("area", SwingConstants.RIGHT);

        zuobiaoTF1 = new JTextField(10);
        zuobiaoTF2 = new JTextField(10);
        distanceTF = new JTextField(10);
        radiusTF = new JTextField(10);
        circumferenceTF = new JTextField(10);
        areaTF = new JTextField(10);
        /* distance=new JButton("distance");
        disHandler=new DistanceButtonHandler();
        distance.addActionListener(disHandler);

        radius=new JButton("radius");
        radHandler=new RadiusButtonHandler();
        radius.addActionListener(radHandler);

        circumference=new JButton("circumference");
        cirHandler=new CircumferenceButtonHandler();
        circumference.addActionListener(cirHandler);

        area=new JButton("area");
        areHandler=new AreButtonHandler();
        area.addActionListener(areHandler);
         */
        calculateB = new JButton("calculate");
        calHandler = new CalculateButtonHandler();
        calculateB.addActionListener(calHandler);

        exitB = new JButton("exit");
        exiHandler = new ExitButtonHandler();
        exitB.addActionListener(exiHandler);

        setTitle("Yuan");
        Container pane = getContentPane();
        pane.setLayout(new GridLayout(7, 2));

        pane.add(zuobiaoL1);
        pane.add(zuobiaoTF1);
        pane.add(zuobiaoL2);
        pane.add(zuobiaoTF2);
        pane.add(distanceL);
        pane.add(distanceTF);
        pane.add(radiusL);
        pane.add(radiusTF);
        pane.add(circumferenceL);
        pane.add(circumferenceTF);
        pane.add(areaL);
        pane.add(areaTF);
        pane.add(calculateB);
        pane.add(exitB);

        setSize(WIDTH, HIGHT);
        setVisible(true);
        setDefaultCloseOperation(EXIT_ON_CLOSE);

    }

    public class CalculateButtonHandler implements ActionListener {

        public void actionPerformed(ActionEvent e) {
            Piont zuobiao1, zuobiao2;
            zuobiao1 = new Piont(zuobiaoTF1.getText());

            zuobiao2 = new Piont(zuobiaoTF2.getText());
            double d = Piont.distance(zuobiao1, zuobiao2);
            double r = Piont.radius(d);
            distanceTF.setText(String.valueOf(d));
            radiusTF.setText(String.valueOf(Piont.radius(d)));
            areaTF.setText("" + Piont.area(r));
            circumferenceTF.setText("" + Piont.circumference(r));

        }
    }

    public class ExitButtonHandler implements ActionListener {

        public void actionPerformed(ActionEvent e) {
            System.exit(0);
        }
    }

    public static class Piont {

        double x, y;

        Piont(String str) {
           //假设坐标输入格式为：x,y 
            String[] strs = str.split(",");
            if(strs.length == 2){
                this.x = Double.parseDouble(strs[0]);
                this.y = Double.parseDouble(strs[1]);
            }
        }

        Piont(double X, double Y) {
            x = X;
            y = Y;
        }

        public static double distance(Piont a, Piont b) {
            double x1 = a.x;
            double y1 = a.y;
            double x2 = b.x;
            double y2 = b.y;
            double aa = Math.pow(x1 - x2, 2) + Math.pow(y1 - y2, 2);
            double d = Math.sqrt(aa);
            return d;
        }

        public static double radius(double d) {
            return (d / 2);
        }

        public static double circumference(double r) {
            return (2 * PAI * r);
        }

        public static double area(double r) {
            return (PAI * r * r);
        }
    }
}

[Jimlyli]

厉害，佩服！！！