Compares two floats for order. : Float « Data Type « Java Tutorial

import java.math.BigDecimal;
import java.math.BigInteger;

 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.

 * Provides extra functionality for Java Number classes.
 * @author <a href="">Rand McNeely</a>
 * @author Stephen Colebourne
 * @author <a href="">Steve Downey</a>
 * @author Eric Pugh
 * @author Phil Steitz
 * @since 1.0
 * @version $Id: 488819 2006-12-19 21:50:04Z bayard $
public class Main {

   * Compares two floats for order.
   * This method is more comprehensive than the standard Java greater than,
   * less than and equals operators.
   * <ul>
   *  <li>It returns <code>-1</code> if the first value is less than the second.
   *  <li>It returns <code>+1</code> if the first value is greater than the second.
   *  <li>It returns <code>0</code> if the values are equal.
   * </ul>
   *  The ordering is as follows, largest to smallest:
   * <ul>
   * <li>NaN
   * <li>Positive infinity
   * <li>Maximum float
   * <li>Normal positive numbers
   * <li>+0.0
   * <li>-0.0
   * <li>Normal negative numbers
   * <li>Minimum float (-Float.MAX_VALUE)
   * <li>Negative infinity
   * </ul>
   * Comparing <code>NaN</code> with <code>NaN</code> will return
   * <code>0</code>.
   * @param lhs  the first <code>float</code>
   * @param rhs  the second <code>float</code>
   * @return <code>-1</code> if lhs is less, <code>+1</code> if greater,
   *  <code>0</code> if equal to rhs
  public static int compare(float lhs, float rhs) {
      if (lhs < rhs) {
          return -1;
      if (lhs > rhs) {
          return +1;
      //Need to compare bits to handle 0.0 == -0.0 being true
      // compare should put -0.0 < +0.0
      // Two NaNs are also == for compare purposes
      // where NaN == NaN is false
      int lhsBits = Float.floatToIntBits(lhs);
      int rhsBits = Float.floatToIntBits(rhs);
      if (lhsBits == rhsBits) {
          return 0;
      //Something exotic! A comparison to NaN or 0.0 vs -0.0
      //Fortunately NaN's int is > than everything else
      //Also negzeros bits < poszero
      //NAN: 2143289344
      //MAX: 2139095039
      //NEGZERO: -2147483648
      if (lhsBits < rhsBits) {
          return -1;
      } else {
          return +1;

2.11.1.Java float is 32 bit single precision type and used when fractional precision calculation is required.
2.11.2.Floating­Point Types
2.11.3.Min and Max values of data type float
2.11.4.Use Float constructor to convert float primitive type to a Float object.
2.11.5.Java Float Comparison
2.11.6.Java Float isInfinite Method
2.11.7.Java Float isNaN Method
2.11.8.Java Float Wrapper Class
2.11.9.Pass floats as string literals to a method
2.11.10.Check if a string is a valid number
2.11.11.Use toString method of Float class to convert Float into String.
2.11.12.Declaring a variable of type float
2.11.13.Declaring more than one float variable in a single statement
2.11.14.Use Float.valueOf to convert string value to float
2.11.15.Convert Java Float to Numeric Primitive Data Types
2.11.16.Convert Java String to Float Object
2.11.17.Convert from float to String
2.11.18.Convert from String to float
2.11.19.Converting a String to a float type Number
2.11.20.Compare Two Java float Arrays
2.11.21.Compares two floats for order.
2.11.22.For a float value x, this method returns +1.0F if x >= 0 and -1.0F if x < 0. Returns NaN if x is NaN.
2.11.23.Tests two float arrays for equality.
2.11.24.Use System.out.printf to format float point number