CODEWITHSUNDEEP
java
laura
laura

Reputation: 165

how to get the name of method in current class

Hello in my java class Toto, I have 3 static methods I would like to know when I'm in one of these methods , how to get and display the name of package.class.methode in the try catch bloc ? I tried in methodeA: 

public static void methodeA(){

try{
system.out.println("I do something");

}
catch(Exception e){
system.out.println("failed" +e.getClass().getMethods().toString());
}

but it is not working, how also could I show it in try ? thanks

Upvotes: 3

Views: 2887

Answers (8)

user2463094
user2463094

Reputation:

If you throw the exception, is affecting your performance. Is not needed throw the exception,

public class AppMain {

 public static void main(String[] args) {
   new AppMain().execute();
 }

 private void execute(){
   RuntimeException exception = new RuntimeException();
   StackTraceElement currentElement = exception.getStackTrace()[0];

   System.out.println(currentElement.getClassName());
   System.out.println(currentElement.getMethodName());
 }
}

Upvotes: 0

Sekhar
Sekhar

Reputation: 11

You can use the example below:

public class A 
{
    public static void main(String args[])
    {
        new A().intermediate();   
    }
    void intermediate() 
    {
        new A().exceptionGenerator();
    }
    void exceptionGenerator()
    {
      try
      {
         throw new Exception("Stack which list all calling methods and classes");
      }
      catch( Exception e )
      {
         System.out.println( "Class is :" + e.getStackTrace()[1].getClassName() + 
                             "Method is :" + e.getStackTrace()[1].getMethodName());

         System.out.println("Second level caller details:");
         System.out.println( "Class is :" + e.getStackTrace()[2].getClassName() + 
                             "Method is :" + e.getStackTrace()[2].getMethodName());

      }
   }
}

Upvotes: 1

Bozho
Bozho

Reputation: 597382

e.printStackTrace(); - that will print the whole exception stracktrace - i.e. all the methods + line numbers.

Upvotes: 1

Buhake Sindi
Buhake Sindi

Reputation: 89199

The preferred option.....

catch(Exception e) {
    e.printStackTrace();
}

or (not a wise option since you don't know what exception is thrown an you have no Stack Trace Elements printed).

catch(Exception e) {
    System.out.println(e.getStackTrace()[0].getMethodName());
}

Upvotes: 0

Jigar Joshi
Jigar Joshi

Reputation: 240966

e.getStackTrace()[0].getMethodName();

Upvotes: 3

kartheek
kartheek

Reputation: 771

e.getStackTrace()[0].getMethodName()

Upvotes: 1

Riduidel
Riduidel

Reputation: 22308

Have ou noticed you already have the information in your exception's stacktrace ?

Indeed, Exception class provides a getStackTrace() method that returns you an array of StacktraceElement. Each of these elements gives you class name, method name, and some other details. What you can do is look in this array if you find one of your three methods, and voila !

However, be warned that detection of method name may fail if you use an obfuscator on your code.

Upvotes: 0

Arne Deutsch
Arne Deutsch

Reputation: 14789

e.printStackTrace();

Upvotes: 3

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