很多种方式 随便写写 public class D extends A{ public int getI(){ int c=2 ; B b=new B(); b.index(); System.out.println("c="+c); return c; } public static void main(String[] args) { B b=new B(); b.index(); } }*********************public class B { public int c; public int index(){ int i=12; System.out.println("i="+i); c=i; return i; } }
请看下面这个简单例子 class Demo1{
public int getNum(){ int num = 2008; return num; } } public class Demo2{ public static void main(String []args){ System.out.println("Demo1类方法里的变量的值是:"+new Demo1().getNum()); } }
public class D extends A{
public int getI(){
int c=2 ;
B b=new B();
b.index();
System.out.println("c="+c);
return c;
} public static void main(String[] args) {
B b=new B();
b.index();
}
}*********************public class B {
public int c;
public int index(){
int i=12;
System.out.println("i="+i);
c=i;
return i; }
}
public int getNum(){
int num = 2008;
return num;
}
}
public class Demo2{ public static void main(String []args){
System.out.println("Demo1类方法里的变量的值是:"+new Demo1().getNum());
} }