比较两个浮点数组的Java程序

数组是存储在连续内存位置的项目的集合。思路是将多个相同类型的项存储在一起。基值是索引0，两个索引之间的差异是偏移量。

在这个程序中，我们需要比较两个具有浮点类型元素的数组。

Two arrays are equal if they contain the same elements in the same order. Two array references are considered equal if both are null.

例子：

float[] floatV1 = new float[] { 3.1f, 7.5f, 8.3f };
float[] floatV2 = new float[] { 8.3f, 8.8f, 9.2f };
float[] floatV3 = new float[] { 3.1f, 7.5f, 8.3f };
float[] floatV4 = new float[] { 3.2f, 5.5f, 5.3f };

if we compare the two arrays using Arrays.equals() method, it will return true/false.

Arrays.equals(floatV1, floatV2) will give us false
Arrays.equals(floatV3, floatV4) will give us false
Arrays.equals(floatV1, floatV3) will give us true

有两种方法可以比较两个浮点数组：

1. 通过简单地遍历整个数组并一一比较每个元素。
2. 使用 Arrays.equals(arr1,arr2) 方法

方法一：通过简单地遍历整个数组并一一比较每个元素。

Java

// Java program to compare two float arrays
// using simple iteration
 
import java.util.Arrays;
public class GFG {
    public static void main(String args[])
    {
        // declaring values in float arrays
        float[] floatV1 = new float[] { 3.1f, 7.5f, 8.3f };
        float[] floatV2 = new float[] { 8.9f, 8.8f, 9.2f };
        float[] floatV3 = new float[] { 3.1f, 7.5f, 8.3f };
 
        System.out.println(compareArrays(floatV2, floatV3));
        System.out.println(compareArrays(floatV1, floatV3));
        System.out.println(compareArrays(floatV1, floatV2));
    }
    public static boolean compareArrays(float arr1[],float arr2[])
    {
        // if the length of the two arrays are not
        // same then the arrays cannot be equal
        if (arr1.length != arr2.length)
            return false;
 
        for (int i = 0; i < arr1.length; i++) {
 
            // if the two ith elements of the two arrays
            // are not same then simply return false
            // and do not check further elements
            if (arr1[i] != arr2[i])
                return false;
        }
 
        // else if we come out of the for loop
        // successfully without returning false ,
        // then that means all the elements were equal
        return true;
    }
}

输出

false
true
false

方法 2：使用Arrays.equals()方法

句法：

public static boolean equals(int[] a, int[] a2)

参数：

• a – 一个要测试相等性的数组
• a2 – 要测试相等性的另一个数组

返回：如果两个数组相等则为真

Java

// Java program to compare two float arrays
// using Arrays.equals() method
 
import java.util.Arrays;
public class GFG {
    public static void main(String args[])
    {
        // declaring values in float arrays
        float[] floatV1 = new float[] { 3.1f, 7.5f, 8.3f };
        float[] floatV2 = new float[] { 8.9f, 8.8f, 9.2f };
        float[] floatV3 = new float[] { 3.1f, 7.5f, 8.3f };
        float[] floatV4 = new float[] { 3.4f, 5.5f, 5.3f };
 
        // printing and comparing the arrays
        // as it will return boolean value
        // i.e. either true or false
        System.out.println(Arrays.equals(floatV1, floatV2));
        System.out.println(Arrays.equals(floatV2, floatV3));
        System.out.println(Arrays.equals(floatV3, floatV4));
        System.out.println(Arrays.equals(floatV1, floatV3));
        System.out.println(Arrays.equals(floatV1, floatV4));
    }
}

输出

false
false
false
true
false