Java程序  |  40行  |  1.09 KB

/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

public class Main {
  public static void main(String[] args) {
    testInstanceOf();
    try {
      testNull();
      throw new Error("Expected ClassClastException");
    } catch (ClassCastException e) { /* ignore */ }
  }

  public static void testInstanceOf() {
    Object o = Main.class;
    if (o instanceof Main) {
      System.out.println((Main)o);
    }
  }

  public static void testNull() {
    Object o = Main.class;
    if (o != null) {
      System.out.println((Main)o);
    }
  }
}