Java Coding Problems

121. Replacing elements of a List

Another common problem that we encounter in applications entails replacing the elements of a List that matches certain conditions.

In the following example, let's consider the Melon class:

public class Melon {  private final String type;  private final int weight;  // constructor, getters, equals(), hashCode(),  // toString() omitted for brevity}

And then, let's consider a List of Melon:

List<Melon> melons = new ArrayList<>();melons.add(new Melon("Apollo", 3000));melons.add(new Melon("Jade Dew", 3500));melons.add(new Melon("Cantaloupe", 1500));melons.add(new Melon("Gac", 1600));melons.add(new Melon("Hami", 1400));

Let's assume that we want to replace all melons weighing less than 3,000 grams with other melons ...