[多选择]下面中哪两个可以在A的子类中使用:( )

class A {

protected int method1 (int a, int b) {

return 0;

}

}

  1. private int method1 (int a, long b) { return 0; }
  2. private int method1 (int a, int b) { return 0; }
  3. public int method 1 (int a, int b) { return 0; }
  4. public short method1 (int a, int b) { return 0; }
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