public class Rectangle {
public int length;
public int width;
int getArea() {
int area;
area=length*width;
return area;
}
public static void main(String[] args) {
// TODO Auto-generated method stub
}
}
//建立公共類Rectangle
//定義公共成員變量length和width
//定義預設方法getArea
//2)在包default package中的RectangleTest.java檔案中定義RectangleTest類:
import java.util.Scanner;
public class RectangleTest {
public static void main(String[] args) {
// TODO Auto-generated method stub
int perimeter,area;
Rectangle rectangle = new Rectangle();
Scanner sc=new Scanner(System.in);
System.out.println("請輸入長方形的長:");
rectangle.length = sc.nextInt();
System.out.println("請輸入長方形的寬:");
rectangle.width = sc.nextInt();
area= rectangle.getArea();
perimeter=*(rectangle.length+rectangle.width);
System.out.println("長方形的面積:area=length*width="+area);
System.out.println("長方形的周長:perimeter=2*(rectangle.length+rectangle.width=4"+perimeter);
}
}
//引入類java.util.Scanner
//定義公共類RectangleTest
//定義變量
//建立屬于公共類Rectangle的對象
//從鍵盤輸入長方形的長和寬
//引入公共類Rectangle中的私有方法getArea();
//引入公共類中的公共變量長和寬,計算長方形的周長!