Line breakpoints are set on an executable line of a program.
Also, the new breakpoint appears in the Breakpoints View list.
While the breakpoint is enabled, thread execution suspends before that line of code is executed. The debugger selects the thread that has suspended and displays the thread's stack frames. The line where the breakpoint was set is highlighted in the editor in the Debug Perspective.
Applying hit counts
Catching Java exceptions
Enabling and disabling breakpoints
Managing conditional breakpoints
Setting method breakpoints
Stepping through the execution of a program