用Java定义一个形状类Shape
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解决时间 2021-02-04 01:43
- 提问者网友：沉默菋噵
- 2021-02-03 05:06
用Java定义一个形状类Shape
最佳答案
- 五星知识达人网友：你哪知我潦倒为你
- 2021-02-03 06:16
publicabstractclass Shape {
publicabstractvoid area();
}
class Circle extends Shape {
privatedoubleradius;
privatedoubleS;
Circle(double radius) {
this.radius = radius;
}
publicvoid area() {
S = 3.14 * radius * radius;
System.out.println(S);
}
}
class Rect extends Shape {
privatedoublelength;
privatedoublewidth;
privatedoubleS;
Rect(double length,double width) {
this.length = length;
this.width = width;
}
publicvoid area() {
S = length * width;
System.out.println(S);
}
}
class Test {
publicstaticvoid main(String[] args) {
Circle a = new Circle(3);
a.area();
Rect b = new Rect(3,4);
b.area();
}
}
publicabstractvoid area();
}
class Circle extends Shape {
privatedoubleradius;
privatedoubleS;
Circle(double radius) {
this.radius = radius;
}
publicvoid area() {
S = 3.14 * radius * radius;
System.out.println(S);
}
}
class Rect extends Shape {
privatedoublelength;
privatedoublewidth;
privatedoubleS;
Rect(double length,double width) {
this.length = length;
this.width = width;
}
publicvoid area() {
S = length * width;
System.out.println(S);
}
}
class Test {
publicstaticvoid main(String[] args) {
Circle a = new Circle(3);
a.area();
Rect b = new Rect(3,4);
b.area();
}
}
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