JDB Quick Reference Guide

• Compiling
  All code must be compiled with the -g flag. For example: javac -g Test.java

• To run JDB
  jdb <classname>

• To exit from JDB
  exit (or quit)

• To run your program (possibly after setting some breakpoints)
  run <classname>

• To run your program with command-line arguments
  run <classname> <args>

• Breakpoints
  

  stop in <class-name>.<method-name>	Stop on entry to the given method.
  stop at <class-name>:<line-number>	Stop at the given line.
  clear <class-name>.<method-name>	Remove the specified breakpoint.
  clear <class-name>:<line-number>	Remove the specified breakpoint.
  cont	Continue (after stopping at a breakpoint).
  step	Execute the current line, (after stopping at a breakpoint). If it includes a method call, stop at the method entry.
  next	Execute the current line, (after stopping at a breakpoint). If it includes a method call, do not stop at the method entry.
  step up	Execute until the current method returns to its caller.

• To look at source code
  

  list	List 10 lines starting 4 before the current line.
  list <line-number>	List 10 lines starting 4 before the given line.
  list <method-name>	List the first 10 lines of the given method.

• To look at the values of variables or expressions

  print <name>	Print the current value of the given variable.
  print <expression>	Print the value of the given expression.
  locals	Print the values of all variables local to the current method.

• Help
  help