class A1{ } 

class A2{ } 

public class B{ 

public static void main(String[] args){

 }

 }

public class Example{ //【1】

public static void main(String args[]){ //【2】 

System.out.println("ok") //【3】 

System.out.println("hello"); 

System.out.println("您好"); //【4】 } }

case 0: System.out.println("Condition 0");

 case 1: System.out.println("Condition 1"); 

case 2: System.out.println("Condition 2");

 case 3: System.out.println("Condition 3");

break; 

default: System.out.println("Other Condition"); }

 当m的值为( )时，输出“Condition 3”

int x = 0,y = 10;   

do{      

x +=2;      

y -=3;   

}while(y > 0); 

int x=12,f;

f = 1;

for (int i = 2; i<x; i++) 

    if( x % i==0 ) 

        f = f+i;

public class Example extends A{

 private float f; int i; 

static int a=10; 

public static void main(String[] args) { 

Example x=new Example();

x=ab；

 }

}

在main()方法中，下面哪条语句的用法是正确的?( )