Java Collection, TreeMap Exercises: Get the portion of a map whose keys range from a given key to another key

Java Collection, TreeMap Exercises: Exercise-22 with Solution

Write a Java program to get the portion of a map whose keys range from a given key to another key.

Sample Solution:-

Java Code:

import java.util.*;
import java.util.Map.Entry;  
public class Example22 {  
           public static void main(String args[]) {

  // Declare tree maps
  TreeMap < Integer, String > tree_map = new TreeMap < Integer, String > ();
  SortedMap < Integer, String > sub_tree_map = new TreeMap < Integer, String > ();

  // Put elements to the map 
  tree_map.put(10, "Red");
  tree_map.put(20, "Green");
  tree_map.put(30, "Black");
  tree_map.put(40, "White");
  tree_map.put(50, "Pink");
  System.out.println("Orginal TreeMap content: " + tree_map);
  sub_tree_map = tree_map.subMap(20, true, 40, true);
  System.out.println("Sub map key-values: " + sub_tree_map);

Sample Output:

Orginal TreeMap content: {10=Red, 20=Green, 30=Black, 40=White, 50=Pink
Sub map key-values: {20=Green, 30=Black, 40=White}

Java Code Editor:

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Java: Tips of the Day

Choice between Float and Double:

Data type Bytes used Significant figures (decimal)
Float 4 7
Double 8 15

Double is often preferred over float in software where precision is important because of the following reasons:
Most processors take nearly the same amount of processing time to perform operations on Float and Double. Double offers far more precision in the same amount of computation time.

Ref: https://bit.ly/3oj7K2K