﻿ Java - Find an element in a tree set greater, equal to other

# Java: Get the element in a tree set which is greater than or equal to the given element

## Java Collection, TreeSet Exercises: Exercise-10 with Solution

Write a Java program to get the element in a tree set which is greater than or equal to the given element.

Sample Solution:

Java Code:

``````import java.util.TreeSet;
import java.util.Iterator;

public class Exercise10 {
public static void main(String[] args) {
// creating TreeSet
TreeSet <Integer>tree_num = new TreeSet<Integer>();

// Add numbers in the tree

System.out.println("Greater than or equal to 86 : "+tree_num.ceiling(86));
System.out.println("Greater than or equal to 29 : "+tree_num.ceiling(29));
}
}
``````

Sample Output:

```Greater than or equal to 86 : 89
Greater than or equal to 29 : 36```

Flowchart: Java Code Editor:

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## Java: Tips of the Day

Oddness Check

Is it possible to use this code to accurately determine the odd number?

```public boolean oddOrNot(int num) {
return num % 2 == 1;
}
```

I hope you noticed a trick. If we decide to check a negative odd number in such a way (-5, for example), the remainder of the division will not be equal to one (what does it mean?) Therefore, use a more accurate method:

```public boolean oddOrNot(int num) {
return (num & 1) != 0;
}
```

It not only solves the problem of negative numbers, but also works more productively than its predecessor. Arithmetic and logical operations are performed much faster than multiplication and division.

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

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