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package com.zpp;public class Charge {
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public static void main(String [] args) {
if(args.length ==0) {
System.out.println("parameter error!");
System.out.println("java com.zpp.Charge [int]");
return;
}
int min = Integer.parseInt(args[0]);
double money = 0.0;
if (min = 0) {
money =0.0;
System.out.println("not money");
} else if (min = 60) {
money = 2.0;
} else {
money = 2.0 + (min - 60) * 0.01;
}
System.out.println("please pay: " + money);
}
} 编译：javac -d . Charge.java运行：java com.zpp.Charge 111
写了一个代码，代码如下，可以进行参考
public class sum {
public static void main(String[] args) {
//创建一个Scanner的对象input
Scanner input = new Scanner(System.in);
//提示用户输入数据
System.out.print("请输入一个整数");
//将输入的值赋给n
int n = input.nextInt();
//定义变量接收计算后的和
int sum = 0;
//利用循环进行求和
for (int i = 0; i = n; i++) {
sum+=i;
}
//输出最后的和
System.out.println("从0一直到"+n+"的所有整数的和是:"+sum);
}
}
Shape.java接口代码
public interface Shape {
public static final double PI = 3.14d;
public double area();
}
Circle.java圆类代码
public class Circle implements Shape {
private double radius;
public Circle(double radius) {
this.radius = radius;
}
@Override
public double area() {
return PI * this.radius * this.radius;
}
public double perimeter() {
return 2 * PI * this.radius;
}
}
Cylinder.java圆柱体类代码
public class Cylinder extends Circle {
private double height;
public Cylinder(double radius, double height) {
super(radius);
this.height = height;
}
public double area() {
return 2 * super.area() + super.perimeter() * this.height;
}
public double volume() {
return super.area() * this.height;
}
}
X5_3_6.java主类代码
public class X5_3_6 {
public static void main(String[] args) {
Circle cir1 = new Circle(5);
System.out.println("圆的面积为：" + cir1.area());
System.out.println("圆的周长为：" + cir1.perimeter());
Cylinder cy1 = new Cylinder(10, 15);
System.out.println("圆柱体的表面积为：" + cy1.area());
System.out.println("圆柱体的体积为：" + cy1.volume());
}
}
上面是我写的代码，下图是执行结果，麻烦看一下，是否可以。