Syntax error Get first entry from NavigableMap in Java

Get first entry from NavigableMap in Java

To display first entry from NavigableMap in Java, use the firstEntry() method.

Let us first create NavigableMap −

NavigableMap<String, Integer> n = new TreeMap<String, Integer>();
n.put("A", 498);
n.put("B", 389);
n.put("C", 868);
n.put("D", 988);
n.put("E", 686);
n.put("F", 888);
n.put("G", 999);
n.put("H", 444);
n.put("I", 555);
n.put("J", 666);

Get the first entry now −

n.firstEntry()

The following is an example to get first entry from NavigableMap.

Example

 Live Demo

import java.util.*;
public class Demo {
   public static void main(String[] args) {
      NavigableMap<String, Integer> n = new TreeMap<String, Integer>();
      n.put("A", 498);
      n.put("B", 389);
      n.put("C", 868);
      n.put("D", 988);
      n.put("E", 686);
      n.put("F", 888);
      n.put("G", 999);
      n.put("H", 444);
      n.put("I", 555);
      n.put("J", 666);
      System.out.println("NavigableMap elements...\n"+n);
      System.out.println("First Entry is "+n.firstEntry());
   }
}

Output

NavigableMap elements...
{A=498, B=389, C=868, D=988, E=686, F=888, G=999, H=444, I=555, J=666}
First Entry is A=498
Updated on: 2019-07-30T22:30:24+05:30

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