JDB - Syntax

This chapter explains the syntax of JDB command. The syntax contains four sections listed as follows:

  • JDB
  • option
  • class
  • arguments


The syntax of JDB is as follows.

jdb [ options ] [ class ] [ arguments ]


It calls jdb.exe from the Java Development Kit.


These include the command line options used to debug a Java program in an efficient way. The JDB launcher accepts all the options (such as -D, -classpath, and -X) and some additional advanced options such as (-attach, -listen, -launch, etc.).


It is the class name on which you want to perform debugging operations.


These are the input values given to a program at runtime. For example, arg[0], arg[1] to the main() method.

In the above four segments, options is the most important one.