【Java】从键盘中输入一个值,在数组中查找该值的索引并输出
问题:
从键盘中输入一个值,在数组中查找该值的索引并输出
代码:
package learnjava; import java.util.Scanner; public class demo13 { public static void main(String[] args) { int []arr= {19, 28, 37, 46, 50}; Scanner sc=new Scanner(System.in); System.out.println("请输入一个数字:"); int input=sc.nextInt(); int index=-1; for (int i=0;i< arr.length;i++){ if (input==arr[i]){ index=i; break; } } System.out.println("index:"+index); } }
package learnjava; import java.util.Scanner; public class demo13 { public static void main(String[] args) { int []arr= {19, 28, 37, 46, 50}; Scanner sc=new Scanner(System.in); System.out.println("请输入一个数字:"); int input=sc.nextInt(); int index=getIndex(arr,input); System.out.println("索引值为:"+index); } public static int getIndex(int []arr,int input){ int index=-1; for (int i=0;i< arr.length;i++){ if (input==arr[i]){ index=i; break; } } return index; } }
结果:
请输入一个数字: 20 index:-1
请输入一个数字: 46 index:3
本文来自博客园,作者:木子欢儿,转载请注明原文链接:https://www.cnblogs.com/HGNET/p/15984182.html