如何在 java 中從陣列中提取唯一值?
要提取陣列中的唯一值,需要將陣列的每個元素與所有剩餘元素比較,如果匹配,則獲得了重複元素。要實現此目的,需要使用兩個迴圈(巢狀),其中內迴圈從 i+1(i 是外迴圈的變數)開始,以避免比較中的重複。
示例
import java.util.Arrays; import java.util.Scanner; public class DetectDuplcate { public static void main(String args[]) { Scanner sc = new Scanner(System.in); System.out.println("Enter the size of the array that is to be created::"); int size = sc.nextInt(); int[] myArray = new int[size]; System.out.println("Enter the elements of the array ::"); for(int i=0; i<size; i++) { myArray[i] = sc.nextInt(); } System.out.println("The array created is ::"+Arrays.toString(myArray)); System.out.println("indices of the duplicate elements :: "); for(int i=0; i<myArray.length; i++) { for (int j=i+1; j<myArray.length; j++) { if(myArray[i] == myArray[j]) { System.out.println(j); } } } } }
輸出
Enter the size of the array that is to be created :: 6 Enter the elements of the array :: 87 52 87 63 41 63 The array created is :: [87, 52, 87, 63, 41, 63] indices of the duplicate elements :: 2 5
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