Doubt on operators

[Venkat KG]

Hi,

Can any one help out in this prog.I really cud not undersatnd what is happening in Line 1 and Line 2 .Why the o/p is printing as 122.

public static void main(String argv[]){
Test1 td = new Test1();
td.samcov();
}
public void samcov(){
int i=1;
int j=2;
if((i==20) && (j==(i=i*2))){ //Line1
}

System.out.print(i);
if((i==20) & (j==(i=i*2))){} // Line 2
System.out.print(i);

int x = i & 2;
System.out.print(x);
}


}

[shaikkhadar basha]

In Line1 && operator is used. In this case since LHS expression evaluates to false, RHS expression doesn't evaluate.
In Line2 & operator is used. In this case both LHS,RHS expression gets evaluated always.
So RHS j==(i=i*2)) assigns 2(i=i*2) to i and j.