Java Arrays hashCode() 方法

语法

复制代码复制代码public static int hashCode(double[] a)
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参数

返回值

返回数组的基于内容的哈希代码。

异常

不适用。

示例:

在下面的示例中，java.util.Arrays.hashCode() 方法用于检查两个双精度数组是否相等。

复制代码复制代码import java.util.*;

public class MyClass {
  public static void main(String[] args) {
    //创建三个双精度数组
    double Arr1[] = {10.1, 5.2, 25.3};
    double Arr2[] = {10.1, 5.2, 25.3};
    double Arr3[] = {10.1, 20.2, 30.3};

    //打印数组的哈希码
    System.out.println("hashCode of Arr1: "+ Arrays.hashCode(Arr1)); 
    System.out.println("hashCode of Arr2: "+ Arrays.hashCode(Arr2)); 
    System.out.println("hashCode of Arr3: "+ Arrays.hashCode(Arr3)); 


    //检查Arr1和Arr2是否相等
    boolean check = (Arrays.hashCode(Arr1) == Arrays.hashCode(Arr2));
    System.out.println("\nAre Arr1 and Arr2 equal?: "+ check);  

    //检查Arr1和Arr3是否相等
    check = (Arrays.hashCode(Arr1) == Arrays.hashCode(Arr3));
    System.out.println("Are Arr1 and Arr3 equal?: "+ check);  
  }
}
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上述代码的输出将是:

复制代码复制代码hashCode of Arr1: -1535839105
hashCode of Arr2: -1535839105
hashCode of Arr3: -2078084000

Are Arr1 and Arr2 equal?: true
Are Arr1 and Arr3 equal?: false
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