"Wrong" return type when using if vs. ternary opertator in Java

java
// Scenario 1: If statement
public static int ifStatement(int x) {
    if (x > 0) {
        return "Positive"; // Incorrect return type
    } else {
        return "Negative"; // Incorrect return type
    }
}

// Scenario 2: Ternary operator
public static int ternaryOperator(int x) {
    return (x > 0) ? "Positive" : "Negative"; // Incorrect return type
}

// Scenario 3: If statement
public static String ifStatement(String str) {
    if (str.length() > 5) {
        return 10; // Incorrect return type
    } else {
        return 5.0; // Incorrect return type
    }
}

// Scenario 4: Ternary operator
public static String ternaryOperator(String str) {
    return (str.length() > 5) ? 10 : 5.0; // Incorrect return type
}

// Scenario 5: If statement
public static boolean ifStatement(boolean flag) {
    if (flag) {
        return 1; // Incorrect return type
    } else {
        return 0; // Incorrect return type
    }
}

// Scenario 6: Ternary operator
public static boolean ternaryOperator(boolean flag) {
    return flag ? 1 : 0; // Incorrect return type
}

public static void main(String[] args) {
    // Scenario 1
    System.out.println(ifStatement(5)); // Output: Compilation Error - Incompatible types
    // Scenario 2
    System.out.println(ternaryOperator(5)); // Output: Compilation Error - Incompatible types
    
    // Scenario 3
    System.out.println(ifStatement("Hello")); // Output: Compilation Error - Incompatible types
    // Scenario 4
    System.out.println(ternaryOperator("Hello")); // Output: Compilation Error - Incompatible types
    
    // Scenario 5
    System.out.println(ifStatement(true)); // Output: Compilation Error - Incompatible types
    // Scenario 6
    System.out.println(ternaryOperator(true)); // Output: Compilation Error - Incompatible types
}

Explanation:

1. In each scenario, the methods `ifStatement` and `ternaryOperator` receive input parameters and return a value.

2. The if statement and ternary operator determine whether a condition is true or false and return a value based on the result.

3. In each scenario, there is an error due to returning an incorrect type in either the if statement or the ternary operator.

4. When you try to compile and run the code, you will encounter compilation errors mentioning “Incompatible types” due to the mismatch in return types.

Feel free to ask if you need further clarification or additional examples!