Overloading a Method in java CS251

// Overloading a method

public int demoOverload () {
    int a = 0;
    return a;
}
public int demoOverload (int a) {
    int a = a;
    return a;
}
public int demoOverload (int a, int b) {
    int a = a + b;
    return a;
}
public double demoOverload (double a, double b) {
    double a = a + b;
    return a;
}
public float demoOverload (float a, float b) {
    float a = a + b;
    return a;
}

// the same method name of demoOverload can take no paramters, one int, two ints, 2 doubles, or 2 floats and will return the same type.