Java统计整数出现次数：如何让输入循环在7个整数后自动终止

Got it, let's tweak your code to automatically end after you enter exactly 7 integers instead of waiting for a 0 input. Here's the revised, cleaner version of your code:

package u07a1_numofoccurrinsevenints; 

import java.util.Scanner; 

public class U07A1_NumOfOccurrInSevenInts { 
    public static void main(String[] args) { 
        Scanner input = new Scanner(System.in); 
        // We only need to store 7 numbers, so resize the array to match
        int number[] = new int[7]; 
        // Use a practical size for count (adjust this if you expect larger input values)
        int count[] = new int[1000]; 
        int temp = 0; 

        System.out.print("Enter seven numbers: "); 
        // Loop exactly 7 times to capture all required inputs
        for (int i = 0; i < 7; i++) { 
            number[i] = input.nextInt(); 
        } 

        // Only iterate over the 7 numbers we actually stored (no wasted cycles)
        for (int i = 0; i < 7; i++) { 
            temp = number[i]; 
            count[temp]++; 
        } 

        for (int i = 0; i < count.length; i++) { 
            if (count[i] > 0) {
                if (count[i] == 1) { 
                    System.out.printf("Number %d occurs %d time\n", i, count[i]); 
                } else {
                    System.out.printf("Number %d occurs %d times\n", i, count[i]); 
                }
            }
        } 
        input.close(); // Properly clean up the scanner resource
    } 
}

Key Changes Breakdown: #

• Fixed Input Loop: Changed the input loop condition from i < number.length to i < 7 — this guarantees we stop after collecting exactly 7 integers, no need for a terminating 0.
• Optimized Array Sizes: Resized the number array to 7 (since we only need to store 7 inputs) and shrank the count array to a more reasonable size (1000, adjust this if you need to handle larger integer values).
• Efficient Statistics Calculation: Now we only loop through the 7 stored numbers instead of the entire giant original array, cutting down on unnecessary computation.
• Added Resource Cleanup: Added input.close() to properly close the scanner, which is good Java coding practice.

Sample Run Output: #

run: Enter seven numbers: 12 23 44 22 23 22 55 
Number 12 occurs 1 time
Number 22 occurs 2 times
Number 23 occurs 2 times
Number 44 occurs 1 time
Number 55 occurs 1 time
BUILD SUCCESSFUL (total time: 10 seconds)

内容的提问来源于stack exchange，提问作者Quenten Guiles