sequential search

　　

 

import java.util.Scanner;

public class B {
  public static void main(String[] args) {
    String[] names={"aa","bb","cc","dd"};
    System.out.println("name: ");
    Scanner scanner=new Scanner(System.in);
    String name=scanner.next();
    int index=-1;
    for(int i=0;i<names.length;++i){
      if(names[i].equals(name)){
        index=i;
        System.out.println("found "+name+" "+i);
        break;
      }
    }
    if(index==-1) System.out.println("not found");

    scanner.close();
  }
}

　　

 

 

申请了一个输入流 System.in，获得内存，但没有关闭