Question

java程序改错(一处错误)

1:
public class C{
int p;
public void setP(int p) {
p = p;
}
}
2：
public class ShowErrors{
public void method1() {
Circle c;
System.out.println("What is radius " + c.getRadius());
c.new Circle();
}
}

Answer 1

1:
public class C{
int p;
public void setP(int p) {
this.p = p;//改这里
}
}
2：
public class ShowErrors{
public void method1() {
Circle c=new Circle();//改这里
System.out.println("What is radius " + c.getRadius());
// c.new Circle();这行删掉
}
}

Answer 2

第一个题没错，只是他考你的是什么？如果他是考你，变量的使用范围那么则是this.p=p;
第2题,c=new Circle();并且吧System.out这句话,放到c=new Circle()下面!

Answer 3

1：
this.p = p;

2：
c = new Circle();

Answer 4

1. this.p=p;

2. System.out.println("What is radius " + c.getRadius());
   c未实例化

Answer 5

this.p = p;