public class LogicalOpers {

public static void main(String[] args) {

int x = 0;

int y = 0;

// nested

if (x == 0) {

if (y == 0) {

System.out.println("Both x and y are zero");

}

}

// combined

if (x == 0 && y == 0) {

System.out.println("Both x and y are zero");

}

// chained

if (x == 0) {

System.out.println("Either x or y is zero");

} else if (y == 0) {

System.out.println("Either x or y is zero");

}

// combined

if (x == 0 || y == 0) {

System.out.println("Either x or y is zero");

}

// De Morgan's

if (!(x == 0 || y == 0)) {

System.out.println("Neither x nor y is zero");

}

if (x != 0 && y != 0) {

System.out.println("Neither x nor y is zero");

}

// boolean variables

boolean flag;

flag = true;

boolean testResult = false;

boolean evenFlag = (x % 2 == 0); // true if x is even

boolean positiveFlag = (x > 0); // true if x is positive

if (evenFlag) {

System.out.println("n was even when I checked it");

}

if (!evenFlag) {

System.out.println("n was odd when I checked it");

}

}

}