Error: identifier expected in Java

Question

I am a new learner of Java. I learned some of the Java core concepts. I got the identifier expected error when run my following code:

class Sekar {
  public          


        

Answer 1

Hava a look at Java: Identifier expected :

i = 900;

is a statement as any other. You can't write statement anywhere. It must be in methods/constructors body. Initializing variable in declaration is called definition and is exception to this rule.

http://docs.oracle.com/javase/tutorial/java/nutsandbolts/expressions.html

If you want to initialize static variable you can do it 2 (sane) ways: Initialize variable right where you are declaring it:

class Sekar {
  public static int i = 900, j,k;

  static void max()
  {
    j = 100;
    if(i>j)
    {
      k=i;
    }
    else {
      k=j;
    }
    System.out.println("The maxmimum vale between"+i+"and"+j+"is :"+k);
  }               
  public static void main(String[] args) {
     max();       
  }
}

or do it in static constructor:

class Sekar {
  public static int i, j,k;

  static {
    i = 900;
  }

  static void max()
  {
    j = 100;
    if(i>j)
    {
      k=i;
    }
    else {
      k=j;
    }
    System.out.println("The maxmimum vale between"+i+"and"+j+"is :"+k);
  }               
  public static void main(String[] args) {
     max();       
  }
}

Also, if you want to define a constant I recommend using final keyword.

j could be converted to local variable.

class Sekar {
  public static final int I = 900;

  static void max()
  {
    int k;
    int j = 100;
    if(I>j)
    {
      k=I;
    }
    else {
      k=j;
    }
    System.out.println("The maxmimum vale between"+I+"and"+j+"is :"+k);
  }               
  public static void main(String[] args) {
     max();       
  }
}