Using Reflection to Count Methods.

Question

I have to write a function

public static int[] countGettersandSetters (String classname)

to count the number of get and set methods and return as an array where index 0 are sets and index 1 are gets.

Can anyone give me a high level approach to how to solve this problem?

Answer 1

public static int[] countGettersandSetters (String className)
    int[] count = new int[2];
    Method[] methods = Class.forName(className).getDeclaredMethods();
    for (Method method : methods) {
        if (method.getName().startsWith("set")) {
            count[0]++;
        } else if (method.getName().startsWith("get") ||
                   method.getName().startsWith("is")) { // to incl. boolean properties
            count[1]++;
        } 
    }
    return count;
}

For a concise tutorial on Reflection API take a look here.