Java Guava Floats类

1 什么是Guava Floats类

Floats 是原始类型 float 的实用程序类。

2 Guava Floats类的语法

@GwtCompatible(emulated = true)
   public final class Floats
      extends Object

3 Guava Floats类的方法

5 Guava Floats类的例子

让我们看一个简单的Guava Floats类示例。

package com.yiidian;

import com.google.common.primitives.Floats;

import java.util.List;

public class GuavaTester {

   public static void main(String args[]) {
      GuavaTester tester = new GuavaTester();
      tester.testFloats();
   }

   private void testFloats() {
      float[] floatArray = {1.0f,2.0f,3.0f,4.0f,5.0f,6.0f,7.0f,8.0f,9.0f};

      //convert array of primitives to array of objects
      List<Float> objectArray = Floats.asList(floatArray);
      System.out.println(objectArray.toString());

      //convert array of objects to array of primitives
      floatArray = Floats.toArray(objectArray);
      System.out.print("[ ");
      
      for(int i = 0; i< floatArray.length ; i++) {
         System.out.print(floatArray[i] + " ");
      }
      
      System.out.println("]");
      
      //check if element is present in the list of primitives or not
      System.out.println("5.0 is in list? " + Floats.contains(floatArray, 5.0f));

      //return the index of element
      System.out.println("5.0 position in list " + Floats.indexOf(floatArray, 5.0f));

      //Returns the minimum		
      System.out.println("Min: " + Floats.min(floatArray));

      //Returns the maximum		
      System.out.println("Max: " + Floats.max(floatArray));	
   }
}

输出结果为：