java怎样判断数组相等 java判断数组中元素相等

java中数组相等判断：

1.最常规的是遍历

public static boolean arrayEquals(String[] a,String[] b){
  boolean flag = false;
  if(a.length != b.length){
   return false;
  }else{
   for (int i = 0; i < a.length; i++) {
    System.out.println(a[i] + "\t" + b[i]);
    if(!a[i].equals(b[i])){
     flag = false;
     break;
    }else{
     flag = true;
    }  
   }
  }
  return flag;
 }

public static boolean arrayEquals(int[] a,int[] b){
          boolean flag = false;
          if(a.length != b.length){
              return false;
          }
        for(int i = 0; i < a.length; i++) {
            System.out.println(a[i] + "\t" + b[i]);
            if(a[i]!=b[i]){
                 flag = false;
                 break;
            }
            flag = true;  
        }
          return flag;
    }

2.用Arrays.equals

Arrays.equals(a, a2);

//下面是 Arrays.equals方法的源码
    public static boolean equals(long[] a, long[] a2) {
        if (a==a2)
            return true;
        if (a==null || a2==null)
            return false;
        int length = a.length;
        if (a2.length != length)
            return false;
        for (int i=0; i<length; i++)
            if (a[i] != a2[i])
                return false;
        return true;
    }