content: /*
   * Copyright (C) 2014 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 {
    static interface Itf {
      public int return1();
      public int return2();
      public int return3();
      public int return4();
      public int return5();
      public int return6();
      public int return7();
      public int return8();
      public int return9();
      public int return10();
      public int return11();
      public int return12();
      public int return13();
      public int return14();
      public int return15();
      public int return16();
      public int return17();
      public int return18();
      public int return19();
      public int return20();
    }
  
    static class ItfImpl1 implements Itf {
      public int return1() { return 1; }
      public int return2() { return 2; }
      public int return3() { return 3; }
      public int return4() { return 4; }
      public int return5() { return 5; }
      public int return6() { return 6; }
      public int return7() { return 7; }
      public int return8() { return 8; }
      public int return9() { return 9; }
      public int return10() { return 10; }
      public int return11() { return 11; }
      public int return12() { return 12; }
      public int return13() { return 13; }
      public int return14() { return 14; }
      public int return15() { return 15; }
      public int return16() { return 16; }
      public int return17() { return 17; }
      public int return18() { return 18; }
      public int return19() { return 19; }
      public int return20() { return 20; }
    }
  
    static class ItfImpl2 implements Itf {
      public int return1() { return -1; }
      public int return2() { return -2; }
      public int return3() { return -3; }
      public int return4() { return -4; }
      public int return5() { return -5; }
      public int return6() { return -6; }
      public int return7() { return -7; }
      public int return8() { return -8; }
      public int return9() { return -9; }
      public int return10() { return -10; }
      public int return11() { return -11; }
      public int return12() { return -12; }
      public int return13() { return -13; }
      public int return14() { return -14; }
      public int return15() { return -15; }
      public int return16() { return -16; }
      public int return17() { return -17; }
      public int return18() { return -18; }
      public int return19() { return -19; }
      public int return20() { return -20; }
    }
  
    public static void main(String[] args) {
      $opt$InvokeInterface(new ItfImpl1(), 1);
      $opt$InvokeInterface(new ItfImpl2(), -1);
    }
  
    public static void assertEquals(int expected, int value) {
      if (expected != value) {
        throw new Error("Expected " + expected +  ", got " + value);
      }
    }
  
    public static void $opt$InvokeInterface(Itf object, int factor) {
      assertEquals(factor * 1, object.return1());
      assertEquals(factor * 2, object.return2());
      assertEquals(factor * 3, object.return3());
      assertEquals(factor * 4, object.return4());
      assertEquals(factor * 5, object.return5());
      assertEquals(factor * 6, object.return6());
      assertEquals(factor * 7, object.return7());
      assertEquals(factor * 8, object.return8());
      assertEquals(factor * 9, object.return9());
      assertEquals(factor * 10, object.return10());
      assertEquals(factor * 11, object.return11());
      assertEquals(factor * 12, object.return12());
      assertEquals(factor * 13, object.return13());
      assertEquals(factor * 14, object.return14());
      assertEquals(factor * 15, object.return15());
      assertEquals(factor * 16, object.return16());
      assertEquals(factor * 17, object.return17());
      assertEquals(factor * 18, object.return18());
      assertEquals(factor * 19, object.return19());
      assertEquals(factor * 20, object.return20());
    }
  }
  