Float compareTo() method in Java with examples

The comapreTo() method of Float Class is a built-in method in Java that compares the two specified float values. The sign of the integer value returned is the same as that of the integer that would be returned by the function call. 

Syntax:

public int compareTo(Object f)

Parameters: The function accepts a mandatory parameter object f which is the value to be compared.

Return Value: The function returns value as below:  

• equal to 0: Object f is equal to the argument object
• less than 0: Object f is less than the argument object
• greater than 0: Object f is greater than the argument object

Below programs illustrates the use of Float.compareTo() function:

Program 1: When two integers are same  

Java

// Java Program to illustrate
// the Float.compareTo() method

import java.lang.Float;

public class GFG {
    public static void main(String[] args)
    {

        // Get the two float values
        // to be compared
        Float f1 = 1023f;
        Float f2 = 1023f;

        // function call to compare two float values
        if (f1.compareTo(f2) == 0) {

            System.out.println("f1=f2");
        }
        else if (f1.compareTo(f2) < 0) {

            System.out.println("f1<f2");
        }
        else {

            System.out.println("f1>f2");
        }
    }
}

Output:

f1=f2

Program 2 : When f1<f2

Java

// Java Program to illustrate
// the Float.compareTo() method

import java.lang.Float;

public class GFG {
    public static void main(String[] args)
    {

        // Get the two float values
        // to be compared
        Float f1 = 10f;
        Float f2 = 1023f;

        // function call to compare two float values
        if (f1.compareTo(f2) == 0) {

            System.out.println("f1=f2");
        }
        else if (f1.compareTo(f2) < 0) {

            System.out.println("f1<f2");
        }
        else {

            System.out.println("f1>f2");
        }
    }
}

Output:

f1

Program 3: When f1>f2

Java

// Java Program to illustrate
// the Float.compareTo() method

import java.lang.Float;

public class GFG {
    public static void main(String[] args)
    {

        // Get the two float values
        // to be compared
        Float f1 = 1023f;
        Float f2 = 10f;

        // function call to compare two float values
        if (f1.compareTo(f2) == 0) {

            System.out.println("f1=f2");
        }
        else if (f1.compareTo(f2) < 0) {

            System.out.println("f1<f2");
        }
        else {

            System.out.println("f1>f2");
        }
    }
}

Output:

f1>f2

Reference: https://docs.oracle.com/javase/7/docs/api/java/lang/Float.html#compareTo(java.lang.Float)