Java - How to create new Entry (key, value)

Question

I\'d like to create new item that similarly to Util.Map.Entry that will contain the structure key, value.

The problem is that

Answer 1

You can just implement the Map.Entry interface yourself:

import java.util.Map;

final class MyEntry implements Map.Entry {
    private final K key;
    private V value;

    public MyEntry(K key, V value) {
        this.key = key;
        this.value = value;
    }

    @Override
    public K getKey() {
        return key;
    }

    @Override
    public V getValue() {
        return value;
    }

    @Override
    public V setValue(V value) {
        V old = this.value;
        this.value = value;
        return old;
    }
}

And then use it:

Map.Entry entry = new MyEntry("Hello", 123);
System.out.println(entry.getKey());
System.out.println(entry.getValue());