用sequenceCheck（int [] arr）方法编写一个SequenceCheck类

Question

如果数组中存在1,2,3元素，请使用该数组打印true。它们不必在数组中连续。否则打印为false ...

Answer 1

public class SequenceCheck{

 static void sequenceCheck(int arr[]){
     int c= 0;
   for( int i =0;i<arr.length;i++){
       if (arr[i]==1)
          c++;
       if (arr[i]==2)
          c++;
       if (arr[i]==3)
          c++;

  }

  if (c==3)
     System.out.println("true");
  else
     System.out.println("false");

}
  public static void main(String args[]){
    int array[]={1,2,3,4,5,6,7,8,9,0};
    sequenceCheck(array);
  }
}