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doubt in label statements

 
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Hi All,

I know we can have labels on loops and blocks. like

public class label{

ijkl:{
int i=10;
}
public void disp(){
pqrs:
for(int i=0;i<10;i++){ ... }

test: //line 1
System.out.println(...);
}

}
but I tried line 1 where label is on single statement and it is working I am confused can any on eplease help me on what kinds of statement we can place labels and where not. any links for this will be usefull.

Thanks
 
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