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Thread: method in class cannot be applied

  1. #1
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    Default method in class cannot be applied

    Hi there, I am a total newbie. Learning java at uni. One of our questions on classes asks us to write some method statements. here is a snippet of the code:
    PersonImproved agent1 = new PersonImproved("Natasha", 99);
      System.out.println(agent1);
      agent1.setName("Sophia");
      agent1.setAge(24);
      System.out.println(agent1);
     
      PersonImproved agent2 = new PersonImproved("Boris", 40);
      System.out.println(agent1.equals(agent2));
      System.out.println(agent1.isSameName(agent2));
      /*System.out.println(agent1.isSameAge(agent2));
       agent2.setName("Sophia");
       System.out.println(agent2.isSameName(agent1));
       agent2.setAge(21);
       System.out.println(agent2.isSameAge(agent1));
     
       System.out.println(agent1.isYoungerThan(agent2));
       agent1.setAge(42);
       agent2.setAge(42);
       System.out.println(agent1.isOlderThan(agent2));
       agent2.setAge(99);
       System.out.println(agent2.isOlderThan(agent1));
       System.out.println(agent1.isYoungerThan(agent2));*/
    }}}
     
    class PersonImproved
    {private String name;
      private int age;
     
      public PersonImproved(String newName, int newAge)
      {name = newName;
        if (newAge >= 0)
          age = newAge;
        else
        {System.out.println("ERROR: Used a negative age.");
          System.exit(0);
        }
      }
     
      public String getName()
      {return name;
      }
     
      public void setName(String name)
      {
        this.name = name;
      }
     
      public int getAge()
      {return age;
      }
     
      public void setAge(int age)
      {
        this.age = age;
      }
     
     
     
      public boolean equals(String name, int age)
      {
        return (this.name == name && this.age == age);
      }
     
      public boolean isSameName(String name, int age)
      {
        return (this.name == name);
      }
     
      /*public boolean isSameAge(String name, int age)
       { 
       return (this.age == age);
       }
     
       public boolean isYoungerThan(String name, int age)
       {
       return (this.age < age);
       }
     
       public boolean isOlderThan(String name, int age)
       {
       return (this.age > age);
       }
     
       public String toString()
       {
       return name + " " + age;
       }*/
    }

    I am getting this error when compiling:

    1 error found:
    File: /Users/RichAnge/JPL/H274.java [line: 21]
    Error: /Users/RichAnge/JPL/H274.java:21: isSameName(java.lang.String,int) in PersonImproved cannot be applied to (PersonImproved)

    and I don't know what this means, can anyone inform me of what the error means so I can fix my code. thanks
    (ps: i have some of the code commented out because I am working one line at a time, i hope that is not my problem lol).


  2. #2
    Super Moderator jps's Avatar
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    Default Re: method in class cannot be applied

    It means the method isSameName requires a String and an int as parameters, but was given a PersonImproved object instead

    ...and welcome to the forum

  3. The Following User Says Thank You to jps For This Useful Post:

    ange (August 30th, 2013)

  4. #3
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    Default Re: method in class cannot be applied

    thanks for your reply, it make a little bit of sense to me - I'm still learning :-)

  5. #4
    Super Moderator jps's Avatar
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    Default Re: method in class cannot be applied

    You are welcome, good luck

  6. The Following User Says Thank You to jps For This Useful Post:

    ange (August 30th, 2013)

  7. #5
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    Default Re: method in class cannot be applied

    all solved, thanks to you explaining that, i tried a couple of new things and I got a green pass! love seeing the green :-)

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