Let's say I have a class and I want one of its methods to behave differently depending on an argument. What I want to do is something like this (I know this doesn't work in Java):
class myClass(int a) {
public void myMethod() {
if (a == 1)
// do something
if (a == 2)
// do something else
}
}
Is there a way to do this?
You have two ways to do that.
Like this:
class MyClass {
private final int a;
public MyClass(int a) {
this.a = a;
}
public void myMethod() {
if (a == 1)
// do something
if (a == 2)
// do something else
}
}
Like that:
class MyClass {
public void myMethod(int a) {
if (a == 1)
// do something
if (a == 2)
// do something else
}
}
keyword in java has specific properties so it's better to know the properties before using.The argument must be passed to the method, not to the class:
class MyClass { // note that class names should start with an uppercase letter.
public void myMethod(int a) {
if (a == 1)
// do something
if (a == 2)
// do something else
}
}
Read the Java language tutorial.
You can pass this argument in constructor
class MyClass {
private int a;
public MyClass(int a){
this.a = a;
}
public void myMethod() {
if (a == 1)
// do something
if (a == 2)
// do something else
}
}
Polymorphism is the way to go. Define your base class first with an abstract method myMethod() and then extend it with two classes providing two different implementations of the method.
