Preparing to debug
You can make your programs easier to debug by following these guidelines:
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Where possible, do not put multiple statements on a single line, because some debugger features operate on a line basis. For example, you cannot step over or set line breakpoints on more than one statement on the same line.
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Attach source code to JAR files if you have the source code.
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Debugger
Remote debugging
Local debugging
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Changing debugger launch options
Running and
debugging
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Debug preferences
Debug view
Run and debug actions