public class Test {  
public static void leftshift（int i， int j） { 
i<<=j；  
}  
public static void main（String args） {  
int i = 4， j = 2；  
leftshift（i， j）；  
System.out.printIn（i）；  
}  
}  
What is the result？ （） 

public class SyncTest { 
private int x；  
private int y；  
public synchronized void setX （int i） （x=1；）  
public synchronized void setY （int i） （y=1；）  
public synchronized void setXY（int 1）（set X（i）； setY（i）；）  
public synchronized Boolean check（） （return x !=y；）  
}  
Under which conditions will check （） return true when called from a different class？