The following will teach you how to debug in Eclipse as simply and intuitively as possible. The steps for debugging other IDEs are also similar.
1. Set a breakpoint where you think something is wrong.
Before the line of code, right-click, pay attention to the right-click, and then select Toggle Breakpoint.
#2. Click Debug. If it is a web program, you need to start the Tomcat or Apache server in Debug mode.
This is very important. The standard Start mode cannot enter the preset breakpoint, and the purpose of debugging cannot be achieved.
#3. Run the program. When the program reaches the breakpoint you just set, it will stop, and the background color of that line of code will be highlighted
At this time you can control the program through the on-screen buttons or keyboard.
4. Enter the debugging interface to see the information you want.
5. You can view the values of all variables in Variables, such as the value in the breakpoint you just set. You can change it by right-clicking ChangeValue. Some IDEs support hot changes in the window. And execute the code
6. The first button below is to enter the method execution. For example, if you call other methods, you can enter the method and execute it step by step. If you click the second button , it will only be executed step by step within this method. When you click the third button, you will jump out of this method and continue to execute the original method that called this method. The instructions are as follows.
#7. Finish executing the program.
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