Java 代码示例：计算圆桌和矩形桌的面积

public class Test { public static void main(String[] args) { int r = 50; int width = 40; int len = 60;

    double roundArea = 0;
    double rectArea = 0;

    TableInfo roundTable = new TableInfo('Round', 4, 100);
    TableInfo rectTable = new TableInfo('Rect', 4, 100);

    roundArea = roundTable.tableArea(r); // 计算圆桌面积
    rectArea = rectTable.tableArea(width, len); // 计算矩形桌面积

    System.out.println('Round Table Area =' + roundArea);
    System.out.println('Rect Table Area=' + rectArea);
}

}

class TableInfo { String shape; int legs; int hight;

public TableInfo(String shape, int legs, int hight) {
    this.shape = shape;
    this.legs = legs;
    this.hight = hight;
}

public void print() {
    System.out.println('Shape=' + shape);
}

// 计算圆桌面积的方法
public double tableArea(int r) {
    return 3.14 * r * r;
}

// 计算矩形桌面积的方法
public double tableArea(int a, int b) {
    return a * b;
}

}