Question

i have class something like this

class MClass
{
private int mem1,mem2,mem3.......;
public int getmem1()
{
return mem1;
}
public int getmem2()
{
return mem2;
}

......

Now I want something like this :

public int getAttr(String attr)
{
if (attr=="mem1")
return mem1;
elseif (attr=="mem2")
return mem2;
.....

How do I implement getAttr for 1000s of attr ?

Please don’t ask me to make mem as array.. that is not possible due to other parts of program.

Answer 1

Use reflection. Reflection

This will allow you to call any public method at runtime using the name of the method as a String.

Class c = Class.forName("MyClass");
Method m = c.getMethod("get"+arg);
return (Integer) m.invoke(this);