Java 调用政府方法

我不知道我是否正确地调用了一个GOval方法。我的目标是创建目标公司标志，但有5个圆圈。我应该让目标符号在窗口中居中，圆圈的数量和尺寸由命名常量控制

我从GOval bigCircle开始，这是我最外层的红色圆圈。我是否正确地合并了createFilledCircle方法

到目前为止，我只有三个圆圈，因为我们是在以前的作业的基础上完成的，而那个作业只有三个圆圈。另外，N_圈如何融入图片

import acm.program.*;
import acm.graphics.*;
import java.awt.*;


public class TargetSymbol extends GraphicsProgram {

public void run(){

    double x = getWidth() / 2;
    double y = getHeight() / 2;




    GOval bigCircle = createFilledCircle(x - OUTER_RADIUS, y - OUTER_RADIUS, 2 * OUTER_RADIUS, 2 * OUTER_RADIUS);
    createFilledCircle.setFilled(true);
    createFilledCircle.setColor(Color.RED);
    add(createFilledCircle);        

    GOval middleCircle = new GOval(100, 100, 200, 200);
    middleCircle.setFilled(true);
    middleCircle.setColor(Color.WHITE);
            add(middleCircle);      



    GOval innerCircle = new GOval(155, 150, 100, 100);
    innerCircle.setFilled(true);
    innerCircle.setColor(Color.RED);
    add(innerCircle);






}
private GOval createFilledCircle(double x, double y, double r, Color color){
    GOval circle = new GOval( x-r, x-y, 2 * r, 2 * r);
    circle.setColor(color);
    circle.setFilled(true);
    return circle;


}


private static final int N_CIRCLE = 5; 
private static final double OUTER_RADUS = 75;
private static final double INNER_RADIUS = 10;

---

我认为你的想法是对的

GOval bigCircle = createFilledCircle(x - OUTER_RADIUS, y - OUTER_RADIUS, 2 * OUTER_RADIUS, 2 * OUTER_RADIUS);
createFilledCircle.setFilled(true);
createFilledCircle.setColor(Color.RED);

没有名为createFilledCircle的变量，因此无法将其设置为填充或设置其颜色。我们可以将其更改为bigCircle，但这是多余的，因为您已经在createFilledCircle（）方法中设置了这些值

我建议您将这两个部分全部去掉，剩下的是：

GOval bigCircle = createFilledCircle(x - OUTER_RADIUS, y - OUTER_RADIUS, 2 * OUTER_RADIUS, 2 * OUTER_RADIUS);

N_CIRCLE，我只能假设它代表了有多少个圆。例如，如果N_圆是5，则有红色的外圆，白色的内圆，红色的内圆，白色的内圆，等等

因此，您需要使用一个循环来创建与您拥有的圆数量（N_CIRCLE）相关的圆

e、 g

for（int a=0；a

我做了同样的作业，并使用此代码成功完成了作业。我为它的草率和糟糕的形式道歉；我第一次学习如何用Java编写时写的

/*
 * File: Target.java
 * Name: 
 * Section Leader: 
 * -----------------
 * This file is the starter file for the Target problem.
 */

import acm.graphics.*;
import acm.program.*;
import java.awt.*;

public class Target extends GraphicsProgram {   
public void run() {
    /* You fill this in. */

    double moveX = getWidth()/2 - 36;
    double moveY = getHeight()/2 - 36;

    GOval outerRed = new GOval(72, 72);
    outerRed.setFilled(true);
    outerRed.setColor(Color.RED);
    outerRed.setFillColor(Color.RED);
    outerRed.move(moveX, moveY);

    GOval middleWhite = new GOval(12.6, 12.6, 46.8, 46.8);
    middleWhite.setFilled(true);
    middleWhite.setColor(Color.WHITE);
    middleWhite.setFillColor(Color.WHITE);
    middleWhite.move(moveX, moveY);

    GOval innerRed = new GOval(25.2, 25.2, 21.6, 21.6);
    innerRed.setFilled(true);
    innerRed.setColor(Color.RED);
    innerRed.setFillColor(Color.RED);
    innerRed.move(moveX, moveY);

    add(outerRed);
    add(middleWhite);
    add(innerRed);
}
}

---

以下是我使用常量的解决方案：

/*
 * File: Target.java
* Name: 
* Section Leader: 
* -----------------
* This file is the starter file for the Target problem.
*/

import acm.graphics.*;
import acm.program.*;
import java.awt.*;

public class Target extends GraphicsProgram {   
    private static final int RADIUS_OUTER_CIRCLE = 72;
    private static final int RADIUS_MID_CIRCLE = 54;
    private static final int RADIUS_INNER_CIRCLE = 32;

    public void run() {

        GOval outerCircle = new GOval(getWidth()/2 - RADIUS_OUTER_CIRCLE/2 , getHeight()/2 - RADIUS_OUTER_CIRCLE/2, RADIUS_OUTER_CIRCLE, RADIUS_OUTER_CIRCLE);
        outerCircle.setFilled(true);
        outerCircle.setFillColor(Color.RED);
        add(outerCircle);

        GOval midCircle = new GOval(getWidth()/2 - RADIUS_MID_CIRCLE/2 , getHeight()/2 - RADIUS_MID_CIRCLE/2, RADIUS_MID_CIRCLE, RADIUS_MID_CIRCLE);
        midCircle.setFilled(true);
        midCircle.setFillColor(Color.WHITE);
        add(midCircle);

        GOval innerCircle = new GOval(getWidth()/2 - RADIUS_INNER_CIRCLE/2 , getHeight()/2 - RADIUS_INNER_CIRCLE/2, RADIUS_INNER_CIRCLE, RADIUS_INNER_CIRCLE);
        innerCircle.setFilled(true);
        innerCircle.setFillColor(Color.RED);
        add(innerCircle);

    }
}

/*
 * File: Target.java
* Name: 
* Section Leader: 
* -----------------
* This file is the starter file for the Target problem.
*/

import acm.graphics.*;
import acm.program.*;
import java.awt.*;

public class Target extends GraphicsProgram {   
    private static final int RADIUS_OUTER_CIRCLE = 72;
    private static final int RADIUS_MID_CIRCLE = 54;
    private static final int RADIUS_INNER_CIRCLE = 32;

    public void run() {

        GOval outerCircle = new GOval(getWidth()/2 - RADIUS_OUTER_CIRCLE/2 , getHeight()/2 - RADIUS_OUTER_CIRCLE/2, RADIUS_OUTER_CIRCLE, RADIUS_OUTER_CIRCLE);
        outerCircle.setFilled(true);
        outerCircle.setFillColor(Color.RED);
        add(outerCircle);

        GOval midCircle = new GOval(getWidth()/2 - RADIUS_MID_CIRCLE/2 , getHeight()/2 - RADIUS_MID_CIRCLE/2, RADIUS_MID_CIRCLE, RADIUS_MID_CIRCLE);
        midCircle.setFilled(true);
        midCircle.setFillColor(Color.WHITE);
        add(midCircle);

        GOval innerCircle = new GOval(getWidth()/2 - RADIUS_INNER_CIRCLE/2 , getHeight()/2 - RADIUS_INNER_CIRCLE/2, RADIUS_INNER_CIRCLE, RADIUS_INNER_CIRCLE);
        innerCircle.setFilled(true);
        innerCircle.setFillColor(Color.RED);
        add(innerCircle);

    }
}