Using gdb

[Homepage] | [Next: About this Document] | [Up: Debugging Programs] | [Prev: Debugging Programs]

Using jdb

To start debugging your program first compile it with "javac -g MyProg.java". Notice the "-g" flag. This causes the compiler to insert debugging information. Then type


    jdb MyProg
    stop in MyProg:main
    run
    list

This should show you the first few lines of your program, with an arrow pointing at the first executable statement in main(). Type help to get a complete list of debugger commands. Here are a few.

next - execute until the next line is reached (use this instead of step)
list - print the statements around where the program is stopped
run - begin executing the program
print x - print the value of the variable x
locals - print the value of all local variables
where - show where the program is stopped

For more information view Sun's documentation for jdb.

Ewerton L. Madruga
Modified by Kevin Klenk