Question

我只是想确保我在这里是正确的。我正在尝试添加方法

更改身高
更改宽度
更改坐标
计算周长

计算面积

public class MyRectangle {

public int width;
public int height;
public int y;
public int x;

public MyRectangle()
{
    width=10;
    height=10;
    y=10;
    x=10;

public int MyRectangle;

public MyRectangle(int width, int height, int y, int x, int MyRectangle) {
    this.width = width;
    this.height = height;
    this.y = y;
    this.x = x;
    this.MyRectangle = MyRectangle;
}
}

我的方法也出现了非法的表达式错误启动。

Answer 1

这是你的问题，你不能在方法中使用方法。但这是因为你没有为你的方法关闭括号。我修改了你的代码并添加了你想要的方法：

public class MyRectangle {

    //Best to group your variables up here
    public int MyRectangle;
    public int width;
    public int height;
    public int y;
    public int x;

    public MyRectangle() {
        width  = 10;
        height = 10;
        y      = 10;
        x      = 10;
    }//Make sure to close this method with the bracket

    public MyRectangle(int width, int height, int y, int x, int MyRectangle) {
        this.width = width;
        this.height = height;
        this.y = y;
        this.x = x;
        this.MyRectangle = MyRectangle;
    }

    /**
     * Changes the current height to the given new height
     * @param newHeight
     */
    public final void changeHeight(int newHeight) {
        height = newHeight;
    }

    /**
     * Changes the current width to the given new width
     * @param newWidth
     */
    public final void changeWidth (int newWidth) {
        width = newWidth;
    }

    /**
     * Calculates the current perimeter based on the width and height
     * @return parameter ofd the rectangle
     */
    public final int getPerimeter() {
        return ((2 * width) + (2 * height));
    }

    /**
     * Calculates the area based on the width and height
     * @return area of the rectangle
     */
    public final int getArea() {
        return (width * height);
    }

    public final void changesXCoordinate(int newX){
        x = newX;
    }

    public final void changesYCoordinate(int newY){
        y = newY;
    }

    public final void changesCoordinate(int newX, int newY) {
        x = newX;
        y = newY;
    }
}

我会尽快解释，只想先发布正确的代码：P

就目前而言，很难理解你还在寻找什么。

如果您正在寻找这个，请将此标记为正确答案：D

如何修复方法错误

1 个答案: