passing Integer or String array as an argument in java

Question

I am writing a java function which which takes two argument : one is a string type and other could be an array of String, Integer, Float, Double, Boolean or just a String .

In JavaScript it is quite easy to pass any data as an argument, but what are the good solutions in java ?

Answer 1

In java you can only pass the data defined in by the method. A way around this can be to use Object as an argument. Besides that you can create many methods with the same name, but accepting different arguments. Example:

public void example(String str, Object obj){ /* code */ }

When using Object you need to make sure to check what type it is, so you don't end up trying to use an integer as a string array.

I am quite sure that using Object is not the best way to go and you should use multiple methods with different arguments.

Answer 2

You can overload the method to accept different parameters.

 void doSomething(String x, int[] y) {}

 void doSomething(String x, String[] y) {}

 void doSomething(String x, String y) {}

That way, you still have type-safety (which an Object argument does not give you).

Answer 3

I suppose this is what you want

public void method1(String str, Object ...val)

Inside the method body, you will have to handle different objects accordingly

Answer 4

As you want second object as any data type array you can do something like this

public void _methodName(String arg1,Object[] arg2)

As String,Integer,Float,Boolean all are inherited from java.lang.Object ,you can simply pass Object[] as second argument and you pass argument( String,Int,....etc ) whatever you want.

Answer 5

The prototype of method as per your need is as follows :

public void testMethod(String strVal, Object[] genericVal)

Now in the body part you have to cast the object into the required format by Using Wrapper Classes.

Above implementation will resolve the issue.