/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
public static void testMethod(String name){
    System.out.println("hello"+name);
}
 
public static void main(String[] args) {
    testMethod("nick");
    //?
    ((Ideone)null).testMethod("tom");//这句话是什么意思呢?求详细解答
 
}
}

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