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Method Math.floor () method gives an integer with a zero fractional part closest to the number of the argument to the left, in other words rounding the fraction to the smaller side.

The method has the following options

double floor(double d)
double floor(float f)

Detailed information about the parameters:

public class Test { 

   public static void main(String args[]) {
      double d1 = 0.4;
      double d2 = -7.75;
      double d3 = 8.6;
      double d4 = 1;
      double d5 = -1;
      
      float f1 = -0.4f;
      float f2 = -5.75f;
      float f3 = 3.4f;
      float f4 = 7;
      float f5 = -7;

      System.out.println("d1 = " + Math.floor(d1));
      System.out.println("d2 = " + Math.floor(d2));
      System.out.println("d3 = " + Math.floor(d3)); 
      System.out.println("d4 = " + Math.floor(d4)); 
      System.out.println("d5 = " + Math.floor(d5)); 
      System.out.println("--------------");  
      System.out.println("f1 = " + Math.floor(f1)); 
      System.out.println("f2 = " + Math.floor(f2));
      System.out.println("f3 = " + Math.floor(f3));
      System.out.println("f4 = " + Math.floor(f4)); 
      System.out.println("f5 = " + Math.floor(f5));
   }
}

Output

d1 = 0.0
d2 = -8.0
d3 = 8.0
d4 = 1.0
d5 = -1.0
--------------
f1 = -1.0
f2 = -6.0
f3 = 3.0
f4 = 7.0
f5 = -7.0