A breakpoint suspends the execution of a thread at the location where the breakpoint is set. To set a breakpoint, right-click in the frame on the left side of an editor beside the line where you want the breakpoint, then choose Add Breakpoint.
Once set, a breakpoint can be enabled and disabled by right-clicking on its icon or by right-clicking on its description in the Breakpoints view.
Debugging breakpoints are displayed in the marker bar in the editor area and in the Breakpoints view.
Note: Execution will also suspend if Stop at main() on startup is enabled on the Launch Configuration dialog. To access the Launch Configuration dialog, from the menu bar choose Run > Debug.