Java Collection Tutorial - Java Map.Entry.getKey()

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Syntax

Map.Entry.getKey() has the following syntax.

K getKey()

Example

In the following code shows how to use Map.Entry.getKey() method.

//  w w  w .ja  va  2s.com
import java.util.Iterator;
import java.util.Map;

public class Main {
  public static void main(String args[]) {
    System.out.println("PATH = " + System.getenv("PATH"));

    Map<String,String> env = System.getenv();
    for (Iterator<Map.Entry<String,String>> it = env.entrySet().iterator(); it.hasNext();) {
      Map.Entry<String,String> entry = it.next();
      System.out.println(entry.getKey() + " = " + entry.getValue());
    }
  }
}

The code above generates the following result.

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