1 /* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.util; 18 19 /** 20 * Math routines similar to those found in {@link java.lang.Math}. 21 * 22 * <p>Historically these methods were faster than the equivalent double-based 23 * {@link java.lang.Math} methods. On versions of Android with a JIT they 24 * became slower and have since been re-implemented to wrap calls to 25 * {@link java.lang.Math}. {@link java.lang.Math} should be used in 26 * preference. 27 * 28 * <p>All methods were removed from the public API in version 23. 29 * 30 * @deprecated Use {@link java.lang.Math} instead. 31 */ 32 @Deprecated 33 public class FloatMath { 34 35 /** Prevents instantiation. */ 36 private FloatMath() {} 37 38 /** 39 * Returns the float conversion of the most positive (i.e. closest to 40 * positive infinity) integer value which is less than the argument. 41 * 42 * @param value to be converted 43 * @return the floor of value 44 * @removed 45 */ 46 public static float floor(float value) { 47 return (float) Math.floor(value); 48 } 49 50 /** 51 * Returns the float conversion of the most negative (i.e. closest to 52 * negative infinity) integer value which is greater than the argument. 53 * 54 * @param value to be converted 55 * @return the ceiling of value 56 * @removed 57 */ 58 public static float ceil(float value) { 59 return (float) Math.ceil(value); 60 } 61 62 /** 63 * Returns the closest float approximation of the sine of the argument. 64 * 65 * @param angle to compute the cosine of, in radians 66 * @return the sine of angle 67 * @removed 68 */ 69 public static float sin(float angle) { 70 return (float) Math.sin(angle); 71 } 72 73 /** 74 * Returns the closest float approximation of the cosine of the argument. 75 * 76 * @param angle to compute the cosine of, in radians 77 * @return the cosine of angle 78 * @removed 79 */ 80 public static float cos(float angle) { 81 return (float) Math.cos(angle); 82 } 83 84 /** 85 * Returns the closest float approximation of the square root of the 86 * argument. 87 * 88 * @param value to compute sqrt of 89 * @return the square root of value 90 * @removed 91 */ 92 public static float sqrt(float value) { 93 return (float) Math.sqrt(value); 94 } 95 96 /** 97 * Returns the closest float approximation of the raising "e" to the power 98 * of the argument. 99 * 100 * @param value to compute the exponential of 101 * @return the exponential of value 102 * @removed 103 */ 104 public static float exp(float value) { 105 return (float) Math.exp(value); 106 } 107 108 /** 109 * Returns the closest float approximation of the result of raising {@code 110 * x} to the power of {@code y}. 111 * 112 * @param x the base of the operation. 113 * @param y the exponent of the operation. 114 * @return {@code x} to the power of {@code y}. 115 * @removed 116 */ 117 public static float pow(float x, float y) { 118 return (float) Math.pow(x, y); 119 } 120 121 /** 122 * Returns {@code sqrt(}<i>{@code x}</i><sup>{@code 2}</sup>{@code +} <i> 123 * {@code y}</i><sup>{@code 2}</sup>{@code )}. 124 * 125 * @param x a float number 126 * @param y a float number 127 * @return the hypotenuse 128 * @removed 129 */ 130 public static float hypot(float x, float y) { 131 return (float) Math.hypot(x, y); 132 } 133 } 134
