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？