想在練習(xí)題中添加Scanner方便輸入，沒有報錯但什么也執(zhí)行不出來
還有怎樣在多個子類中添加scanner
慕粉3915589
2016-09-26
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2016-09-26
import java.util.Scanner;
public class Rectangle extends Shape{
public Rectangle(){//無參構(gòu)造函數(shù)
a = 0;
b = 0;
}
public Rectangle(int a,int b){//有參構(gòu)造函數(shù)
this.a = a;
this.b = b;
}
public void area(){
int area = a*b;
System.out.println("矩形面積area:"+area);
}
public void cm(){
int cm = (a+b)*2;
System.out.println("矩形周長cm:"+cm);
}
public static void main(String[] args) {
System.out.println("請輸入長：");
Scanner input = new Scanner(System.in);
int temp1 = input.nextInt();
System.out.println("請輸入寬：");
int temp2 = input.nextInt();
Rectangle R1 = new Rectangle(temp1,temp2);
R1.area();
R1.cm();
}
}
2016-09-26
sanner放在方法中試試，而不是直接放在類下面
2016-09-26
你把Scanner 放到main方法中