Java ErrorsLesson 45Free preview

Java Debugging

This lesson is part of Java · All levels

Summary

Debugging is the process of finding and fixing bugs in a program systematically. You can use an IDE debugger with breakpoints to stop the program and observe the value of the variable, or a simple technique of recording the value to the screen. The key is to read the error message carefully because it usually mentions the file and the cause line.

Key points

Breakpoint makes the program pause temporarily so that the value of the variable can be checked
Print debugging prints values at critical dots to track the execution stream
The compilation error message contains the file name and the line number to be checked
Gradual division and conquer testing speeds up bug discovery

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