Debugging the Main Thread of a Multi-Thread Application

This section provides a tutorial example on how to debug the main thread of a multi-thread application.

4. Going back to the main thread:

Thread-0[1] stop at PrimeNumberSeeker:19
Set breakpoint PrimeNumberSeeker:19
Thread-0[1] cont
Breakpoint hit: "thread=main", PrimeNumberSeeker.main(), line=19 bci=25
19             System.out.println( i+", "+t.current+", "+t.count);

main[1] where all
  [1] PrimeNumberSeeker.main (
  [1] java.lang.Thread.sleep (native method)
  [2] (

main[1] print i
 i = 11

main[1] print t.current
 t.current = 3

main[1] print t.count
 t.count = 1

What I have done here:

Last update: 2015.

Table of Contents

 About This Book

 Java Tools Terminology

 Installing Java 8 on Windows

 'javac' - The Java Program Compiler

 'java' - The Java Program Launcher

'jdb' - The Java Debugger

 'jdb' - Java Debugger Command and Options

 Starting a Debugging Session with 'jdb'

 Debugging Applications with Separate 'jdb' Sessions

 Debugging Java Applications Remotely

 Listing Debugging Commands with 'help' Command - Multi-Thread Sample Program

 Starting Debugging Session on a Multi-Thread Application

 Stepping through Statements of a Child Thread

 Checking Variable Values in a Debugging Session

Debugging the Main Thread of a Multi-Thread Application

 Switching Execution Threads in a Debugging Session

 Suspending Main Thread to Debug Child Thread

 'jconsole' - Java Monitoring and Management Console

 'jstat' - JVM Statistics Monitoring Tool

 JVM Troubleshooting Tools

 jvisualvm (Java VisualVM) - JVM Visual Tool

 'jar' - The JAR File Tool

 'javap' - The Java Class File Disassembler

 'keytool' - Public Key Certificate Tool

 'native2ascii' - Native-to-ASCII Encoding Converter

 Outdated Tutorials


 PDF Printing Version