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copied!<h2><a href="https://docs.oracle.com/javase/7/docs/api/java/util/AbstractMap.SimpleEntry.html" rel="noreferrer">AbstractMap.SimpleEntry</a></h2> <p>Easy you are looking for this:</p> <pre><code>java.util.List<java.util.Map.Entry<String,Integer>> pairList= new java.util.ArrayList<>(); </code></pre> <p>How can you fill it?</p> <pre><code>java.util.Map.Entry<String,Integer> pair1=new java.util.AbstractMap.SimpleEntry<>("Not Unique key1",1); java.util.Map.Entry<String,Integer> pair2=new java.util.AbstractMap.SimpleEntry<>("Not Unique key2",2); pairList.add(pair1); pairList.add(pair2); </code></pre> <p>This simplifies to:</p> <pre><code>Entry<String,Integer> pair1=new SimpleEntry<>("Not Unique key1",1); Entry<String,Integer> pair2=new SimpleEntry<>("Not Unique key2",2); pairList.add(pair1); pairList.add(pair2); </code></pre> <p>And, with the help of a <code>createEntry</code> method, can further reduce the verbosity to:</p> <pre><code>pairList.add(createEntry("Not Unique key1", 1)); pairList.add(createEntry("Not Unique key2", 2)); </code></pre> <p>Since <code>ArrayList</code> isn't final, it can be subclassed to expose an <code>of</code> method (and the aforementioned <code>createEntry</code> method), resulting in the syntactically terse:</p> <pre><code>TupleList<java.util.Map.Entry<String,Integer>> pair = new TupleList<>(); pair.of("Not Unique key1", 1); pair.of("Not Unique key2", 2); </code></pre>

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