﻿ Java Collection, TreeMap Exercises: Get the portion of this map whose keys are less than a given key - w3resource # Java Collection, TreeMap Exercises: Get the portion of this map whose keys are less than a given key

## Java Collection, TreeMap Exercises: Exercise-14 with Solution

Write a Java program to get the portion of this map whose keys are less than (or equal to, if inclusive is true) a given key.

Sample Solution:-

Java Code:

``````import java.util.*;
import java.util.Map.Entry;
public class Example14 {
public static void main(String args[]) {

// Create a tree map
TreeMap < Integer, String > tree_map1 = new TreeMap < Integer, String > ();

// Put elements to the map
tree_map1.put(10, "Red");
tree_map1.put(20, "Green");
tree_map1.put(40, "Black");
tree_map1.put(50, "White");
tree_map1.put(60, "Pink");

System.out.println("Orginal TreeMap content: " + tree_map1);
System.out.println("Checking the entry for 10: ");
System.out.println("Checking the entry for 20: ");
System.out.println("Checking the entry for 70: ");
}
}
``````

Sample Output:

```Orginal TreeMap content: {10=Red, 20=Green, 40=Black, 50=White, 60=Pink
}
Checking the entry for 10:
Key(s): {10=Red}
Checking the entry for 20:
Key(s): {10=Red, 20=Green}
Checking the entry for 70:
Key(s): {10=Red, 20=Green, 40=Black, 50=White, 60=Pink}```

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