Question

我刚开始用java编程，我正在尝试一些东西。我编写了一些代码来创建我自己的x索引数组，我可以在程序运行时填写这些代码。因此，如果我运行该程序，我可以说x = 5，我将有5个索引填写（例如5,2,7,4和7）。然后程序将找到最大值并打印出来。然后我想知道我是否可以让我的程序打印我的maxValue在数组中的次数。在上面的例子中，它将是两个。我似乎无法找到如何做到这一点。

这是我到目前为止的代码：

import java.util.*;

public class oefeningen {

static void maxValue(int[] newArray){//this method decides the largest number in the array

    int result = newArray[0];
    for (int i=1; i<newArray.length; i++){
        if (newArray[i] > result){
            result = newArray[i];
        }
    }
        System.out.println("The largest number is: " +result);
}

public static void main(String[] args) {

    Scanner keyboard = new Scanner(System.in);

    int x; //this is the main part of the array
    System.out.println("Please enter size of array:");
    x = keyboard.nextInt();
    int[] newArray = new int[x];

    for (int j=1; j<=x; j++){//this bit is used for manually entering numbers in the array
        System.out.println("Please enter next value:");
        newArray[j-1] = keyboard.nextInt();
    }
    maxValue(newArray);
}
}

Answer 1

您可以在maxValue函数中跟踪，并在每次发现新的最大值时重置计数器。像这样：

static void maxValue(int[] newArray){//this method decides the largest number in the array

    int count = 0;
    int result = newArray[0];
    for (int i=1; i<newArray.length; i++){
        if (newArray[i] > result){
            result = newArray[i];
            // reset the count
            count = 1;
        }
        // Check for a value equal to the current max
        else if (newArray[i] == result) {
             // increment the count when you find another match of the current max
             count++;
        }
    }
    System.out.println("The largest number is: " +result);
    System.out.println("The largest number appears " + count + " times in the array");
}

Answer 2

只需传递数组和任何值来计算它在数组中出现的次数

public int checkAmountOfValuesInArray(int[] array, int val) {
        int count = 0;
        for (int i = 0; i < array.length; i++) {
            if (array[i]==val) count++;
        }
        return count;
}

或者如果你想在一个循环中完成所有事情：

static void maxValue(int[] newArray) {//this method decides the largest number in the array
        int result = newArray[0];
        int count = 1;

        for (int i = 1; i < newArray.length; i++) {
            if (newArray[i] > result) {
                result = newArray[i];
                count = 1;
            } else if (newArray[i] == result) {
                count++;
            }
        }
        System.out.println("The largest number is: " + result+ ", repeated: " + count + " times");
    }

如何在java中从数组中打印多个最大值

2 个答案: