Guava – IntMath.checkedMultiply()方法及实例

Guava – IntMath.checkedMultiply()方法及实例

checkedMultiply(int a, int b)是Guava的IntMath类的一个方法,接受两个参数 a and b ,并退回他们的产品。

语法:

public static int checkedMultiply(int a, int b)

参数: 该方法接受两个int值a和b并计算它们的乘积。

返回值: 该方法返回传递给它的int值的乘积,只要它不溢出。

异常情况: CheckedMultiply(int a, int b)方法在乘积(即(a – b))溢出的情况下会抛出ArithmeticException。

下面的例子说明了上述方法的实现。

例1:

// Java code to show implementation of
// checkedMultiply(int a, int b) method
// of Guava's IntMath class
  
import java.math.RoundingMode;
import com.google.common.math.IntMath;
  
class GFG {
  
    // Driver code
    public static void main(String args[])
    {
        int a1 = 25;
        int b1 = 36;
  
        // Using checkedMultiply(int a, int b)
        // method of Guava's IntMath class
        int ans1 = IntMath.checkedMultiply(a1, b1);
  
        System.out.println("Product of " + a1 + " and "
                           + b1 + " is: " + ans1);
  
        int a2 = 150;
        int b2 = 667;
  
        // Using checkedMultiply(int a, int b)
        // method of Guava's IntMath class
        int ans2 = IntMath.checkedMultiply(a2, b2);
  
        System.out.println("Product of " + a2 + " and "
                           + b2 + " is: " + ans2);
    }
}

输出:

Product of 25 and 36 is: 900
Product of 150 and 667 is: 100050

例2:

// Java code to show implementation of
// checkedMultiply(int a, int b) method
// of Guava's IntMath class
  
import java.math.RoundingMode;
import com.google.common.math.IntMath;
  
class GFG {
  
    static int findDiff(int a, int b)
    {
        try {
  
            // Using checkedMultiply(int a, int b) method
            // of Guava's IntMath class
            // This should throw "ArithmeticException"
            // as the product overflows in signed
            // int arithmetic
            int ans = IntMath.checkedMultiply(a, b);
  
            // Return the answer
            return ans;
        }
        catch (Exception e) {
            System.out.println(e);
            return -1;
        }
    }
  
    // Driver code
    public static void main(String args[])
    {
        int a = Integer.MIN_VALUE;
        int b = 452;
  
        try {
  
            // Function calling
            findDiff(a, b);
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

输出:

java.lang.ArithmeticException: overflow

参考资料:

https://google.github.io/guava/releases/20.0/api/docs/com/google/common/math/IntMath.html#checkedMultiply-int-int-

赞(0)

评论 抢沙发

评论前必须登录!

 

Guava 教程
Guava 教程Guava - 概述Guava - 环境搭建Guava - Optional类Guava - Preconditions类Guava - Ordering类Guava - Objects类Guava - Range类Guava - Throwables类Guava - Collections 工具类Guava - Caching 工具类Guava - Multiset接口Guava - bimapGuava - MultiMap
Guava Ints类
Guava Ints类Guava Ints - concat() 函数Guava Ints - lastIndexOf() 函数Guava Ints - contains() 函数Guava Ints - asList() 函数Guava Ints - max() 函数Guava Ints - min() 函数Guava Ints - join() 函数Guava Ints - toArray() 函数Guava Ints - indexOf() 函数
Guava Chars类
Guava Chars类Guava - Chars.compare()方法与实例Guava - Chars.hashCode()方法与实例Guava - Chars.min()方法与实例Guava - Chars.max()方法与实例Guava - Chars.toArray()方法与实例Guava - Chars.concat()方法与实例Guava - Chars.contains()方法与实例Guava - Chars.lastIndexOf()方法与实例Guava - Chars.join()方法与实例Guava - Chars.indexOf()方法与实例Guava - Chars.asList()方法与实例
Guava LongMath类
Guava LongMath类Guava - LongMath.binomial方法与实例Guava - LongMath.log2方法与实例Guava - LongMath.pow方法与实例Guava - LongMath.isPowerOfTwo方法与实例Guava - LongMath.gcd方法与实例Guava - LongMath.mean方法与实例Guava - LongMath.sqrt方法与实例Guava - LongMath.mod方法与实例Guava - LongMath.log10方法与实例Guava - LongMath.checkedMultiply方法与实例Guava - LongMath.checkedAdd方法与实例Guava - LongMath.checkedPow方法与实例Guava - LongMath.divide方法与实例
Guava Longs类
Guava Longs类Guava - Longs.compare()方法与实例Guava - Longs.hashCode()方法与实例Guava - Longs.factorial方法与实例Guava - Longs.contains()方法与实例Guava - Longs.min()方法与实例Guava - Longs.max()方法与实例Guava - Longs.toArray()方法与实例Guava - Longs.lastIndexOf()方法与实例Guava - Longs.join()方法与实例Guava - Longs.asList()方法与实例Guava - Longs.checkedSubtract()方法与实例Guava - Longs.concat()方法与实例Guava - Longs.indexOf()方法与实例
Guava Booleans类
Guava Booleans类Guava - Booleans.asList()方法及示例Guava - Booleans.compare()方法及示例Guava - Booleans.concat()方法及示例Guava - Booleans.contains()方法及示例Guava - Booleans.countTrue()方法及示例Guava - Booleans.hashCode()方法及示例Guava - Booleans.indexOf()方法及示例Guava - Booleans.join()方法及示例Guava - Booleans.lastIndexOf()方法及示例Guava - Booleans.toArray()方法及示例
Guava Shorts类
Guava Shorts类Guava - Shorts.toArray()方法及实例Guava - Shorts.min()方法及实例Guava - Shorts.max()方法及实例Guava - Shorts.lastIndexOf()方法及实例Guava - Shorts.join()方法及实例Guava - Shorts.indexOf()方法及实例Guava - Shorts.hashCode()方法及实例Guava - Shorts.contains()方法及实例Guava - Shorts.concat()方法及实例Guava - Shorts.asList()方法及实例
Guava IntMath类
Guava IntMath类Guava - IntMath.checkedAdd()方法及实例Guava - IntMath.checkedMultiply()方法及实例Guava - IntMath.checkedPow()方法及实例Guava - IntMath.checkedSubtract()方法及实例Guava - IntMath.divide()方法及实例Guava - IntMath.log10()方法及实例