Source pane

During a debugging session, the Source pane displays the Java source code corresponding with the item selected in the Threads and Stack pane of the Debugger.

Icons in the Source pane

Icon Graphic Meaning
The execution point for this thread. The line has not been executed yet.
Breakpointable line. If you set a breakpoint on this line, the breakpoint will be valid.
Invalid breakpoint.
Breakpoint.
Verified breakpoint.

See also:
User's Guide: Finding the execution point
User's Guide: Running to the cursor location
User's Guide: Showing where a method was called
User's Guide: Using breakpoints
User's Guide: Watching expressions