Randomly remove a number of elements from an array to form a new array

/**

* Randomly remove a number of elements from an array to form a new array

* @param array of arrays of a string type

* @param number of elements to be removed

* @return a random array

* @throws NullPointerException The original array cannot be empty

* @throws arrayindexoutofboundsexception new array length should not be greater than the length of the original array

*/

public static string[] Getrandomarray (string[] array, int number)

Throws NullPointerException, ArrayIndexOutOfBoundsException {

Random random = new random ();

string[] Arraynew = new string[number];//The newly obtained array

String[] arraytemp = array in array;//change, first equals original array

int index;//array array subscript in the definition change

for (int i = 0; i < arraynew.length; i++) {

index = Random.nextint (arraytemp.length); randomly get an array subscript

Arraynew[i] = arraytemp[index];//Copy to get new array

Arraytemp = copyexcept (arraytemp, index);}

return arraynew;}

}

return arraynew;

}

Randomly remove a number of elements from an array to form a new array