Java Collection How to - Read map by Map.Entry

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Question

We would like to know how to read map by Map.Entry.

Answer

/*from   w w  w .  ja v  a  2 s . co m*/
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;

public class Main {
  public static void main(String[] a) {
    Properties props = System.getProperties();
    Iterator iter = props.entrySet().iterator();

    while (iter.hasNext()) {
      Map.Entry entry = (Map.Entry) iter.next();
      System.out.println(entry.getKey() + " -- " + entry.getValue());
    }

  }
}

The code above generates the following result.

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