Differences, application scenarios and code examples of & && and | and | in Java

public class Main {
    public static void main(String[] args) {
        boolean a = true;
        boolean b = false;

        // Use &        boolean result1 = a & checkCondition();
        // Output: Result with &: false        ("Result with &: " + result1); 

        // Use &&        boolean result2 = a && checkCondition();
        // Output: Result with &&: false        ("Result with &&: " + result2); 

        // Use &, even if the left is false, the right expression will still be calculated        boolean result3 = b & checkCondition();
        // Output: Result with &: false        ("Result with &: " + result3); 

        // When using &&, if the left is false, the expression on the right will not be calculated        boolean result4 = b && checkCondition();
        // Output: Result with &&: false        ("Result with &&: " + result4); 
    }

    public static boolean checkCondition() {
        ("Checking condition");
        return false;
    }
}

public class Main {
    public static void main(String[] args) {
        boolean a = true;
        boolean b = false;

        // Use |        boolean result1 = a | checkCondition();
        // Output: Result with |: true        ("Result with |: " + result1); 

        // Use ||        boolean result2 = a || checkCondition();
        // Output: Result with ||: true        ("Result with ||: " + result2); 

        // Use |, even if the left is true, the right expression will still be calculated        boolean result3 = b | checkCondition();
        // Output: Result with |: false        ("Result with |: " + result3); 

        // When using ||, the left is true, the expression on the right will not be calculated        boolean result4 = b || checkCondition();
        // Output: Result with ||: true        ("Result with ||: " + result4); 
    }

    public static boolean checkCondition() {
        ("Checking condition");
        return false;
    }
}

public class Main {
    public static void main(String[] args) {
        // Logging        boolean condition1 = checkCondition1();
        boolean condition2 = checkCondition2();
        boolean result1 = condition1 & condition2;
        ("Final result: " + result1);

        // Update multiple statuses        boolean status1 = updateStatus1();
        boolean status2 = updateStatus2();
        boolean result2 = status1 & status2;
        ("Final result: " + result2);

        // Multiple side effects operations        boolean operation1 = performOperation1();
        boolean operation2 = performOperation2();
        boolean result3 = operation1 & operation2;
        ("Final result: " + result3);

        // Multiple input verification        boolean isValid1 = validateInput1();
        boolean isValid2 = validateInput2();
        boolean result4 = isValid1 & isValid2;
        ("Final result: " + result4);
    }

    public static boolean checkCondition1() {
        ("Checking condition 1");
        return true;
    }

    public static boolean checkCondition2() {
        ("Checking condition 2");
        return false;
    }

    public static boolean updateStatus1() {
        ("Updating status 1");
        return true;
    }

    public static boolean updateStatus2() {
        ("Updating status 2");
        return false;
    }

    public static boolean performOperation1() {
        ("Performing operation 1");
        return true;
    }

    public static boolean performOperation2() {
        ("Performing operation 2");
        return false;
    }

    public static boolean validateInput1() {
        ("Validating input 1");
        return true;
    }

    public static boolean validateInput2() {
        ("Validating input 2");
        return false;
    }
}