I have this article bookmarked on setting this up for Java 5 and below. Basically run it with :. For Java 5 and above , run it with:. Since Java 9. There are a lot of environment special configurations needed if you are using Maven. So, if you start your program from maven, just run the mvnDebug command instead of mvn , it will take care of starting your app with remote debugging configurated. Now you can just attach a debugger on port Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. What are Java command line options to set to allow JVM to be remotely debugged?
Ask Question. Asked 13 years, 3 months ago. Active 1 month ago. Viewed k times. What are they and what do they mean? Improve this question. Gama11 Add a comment. Active Oldest Votes. Similarly u can inspect the value of other variables that are being initialized till the execution of the line, otherwise you will get null.
I hope it would be helpful for beginners, to understand how to debug your program through command line. Sandeep January 5, at PM. Laraib September 19, at AM. Newer Post Home. We assume the readers of this tutorial have Java SDK version 1. For example,. This chapter explains the syntax of JDB command. The syntax contains four sections listed as follows:. 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.
These are the input values given to a program at runtime. For example, arg[0], arg[1] to the main method. This chapter describes the important options available in JDB that are submitted as arguments with the jdb command. This chapter describes how to start a JDB session in different ways. Let us assume we have a class named TestClass.
If you follow this command, it starts a new Java VM with any specified parameters. Thereafter it loads the class and stops it before executing the first statement of the class. This chapter takes you through the basic commands of JDB. After launching a session, these commands are used for debugging a program.
This command executes the main class file, which is added to JDB for debugging. Execute the following commands to run the Add class. This chapter explains the concept of breakpoints and how to set breakpoints in a program. A breakpoint introduces an explicit stop or pause in the execution of a program at a particular line of code while debugging. It is useful to acquire knowledge about variables in the program in its execution.
Let us take an example for debugging. Here, we start the debugging process by setting up a breakpoint on main.
Given below are the steps to be followed in the debugging process:. If you run this command, you get to see the following output. In this output, you find that the execution stops at the breakpoint position, that is at the main function. You can observe this information in the output. This chapter explains how to use the concept of Stepping in debugging a program.
Stepping is the debugger feature that lets you execute the code by stepping through line by line. Using this, you can examine each line of the code to ensure they are behaving as intended. Let us assume that the breakpoint is set on the main method of the Add class. The following steps show how to apply stepping in the Add class. If you execute this command, you get to see the following output.
In this output, you can find that the execution stops at the breakpoint position, i. You get the following output. List command is used to let you know the line in the code up to which the program control has reached. Using this command, you can step to the next line of the code.
If the next line of the code is a function call, then it enters the function by driving the control at the top line of the function. If you use the step into command, the controller moves to the next line, i. At this line, there is a function call addition int, int hence the controller moves to the topmost line of the addition function with the arrow mark as shown below:.
Step Over also executes the next line. But if the next line is a function call, it executes that function in the background and returns the result.
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