Caspar Ant

自动调用toString方法——

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//A.java
public class A extends B
{
public String toString()
{
return "A";
}
}
 
//B.java
public class B
{
public String toString()
{
return "B";
}
}
 
//C.java
public class C
{
public static void main(String[] args)
{
Object o[] = {new A(), new B()};
 
System.out.print(o[0]);
System.out.print(o[1]);
}
}