Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.lang.reflect.Method;

import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;

public class Main {
    public static void putAllInHashMapByGivenAttribute(HashMap map, Collection col, String attribName) {

        Iterator iter = col.iterator();
        while (iter.hasNext())
            putInHashMapByGivenAttribute(map, iter.next(), attribName);
    }

    public static HashMap putAllInHashMapByGivenAttribute(Collection col, String attribName) {
        HashMap map = new HashMap();
        putAllInHashMapByGivenAttribute(map, col, attribName);
        return map;
    }

    public static void putInHashMapByGivenAttribute(HashMap map, Object obj, String attribName) {
        try {
            Class class1 = obj.getClass();
            String methodName = "get" + Character.toUpperCase(attribName.charAt(0)) + attribName.substring(1);
            Method method = class1.getMethod(methodName, new Class[0]);
            Object attributeValue = method.invoke(obj, new Object[0]);
            map.put(attributeValue, obj);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}