Guava IntMath類

IntMath提供整型的實(shí)用方法。

類聲明

以下是com.google.common.math.IntMath類的聲明：

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

方法

方法繼承

這個(gè)類從以下類繼承的方法：

• java.lang.Object

IntMath 例子

選擇使用任何編輯器創(chuàng)建以下java程序在 C:/> Guava

import java.math.RoundingMode;
import com.google.common.math.IntMath;

public class GuavaTester {

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

   private void testIntMath(){
      try{
         System.out.println(IntMath.checkedAdd(Integer.MAX_VALUE, Integer.MAX_VALUE));
      }catch(ArithmeticException e){
         System.out.println("Error: " + e.getMessage());
      }

      System.out.println(IntMath.divide(100, 5, RoundingMode.UNNECESSARY));
      try{
         //exception will be thrown as 100 is not completely divisible by 3 thus rounding
         // is required, and RoundingMode is set as UNNESSARY
         System.out.println(IntMath.divide(100, 3, RoundingMode.UNNECESSARY));
      }catch(ArithmeticException e){
         System.out.println("Error: " + e.getMessage());
      }

      System.out.println("Log2(2): "+IntMath.log2(2, RoundingMode.HALF_EVEN));

      System.out.println("Log10(10): "+IntMath.log10(10, RoundingMode.HALF_EVEN));

      System.out.println("sqrt(100): "+IntMath.sqrt(IntMath.pow(10,2), RoundingMode.HALF_EVEN));

      System.out.println("gcd(100,50): "+IntMath.gcd(100,50上一篇：Guava Shorts類下一篇：Guava Ordering類