What different breakpoint icons mean in Eclipse?

When working with breakpoints in Eclipse I sometimes notice that they 开发者_高级运维have different icons / annotations (markers on left sidebar). Sometimes it's just a blue ball, sometimes it has a checkmark on it and sometimes it is crossed. What do all these annotations mean?

• blue ball: regular breakpoint, active (possibly with a hit count set)
• empty ball (i.e. white): breakpoint has been disabled (remove checkmark in the breakpoint view, or disable in context menu)
• diagonal line through breakpoint: all breakpoints have been disabled (button skip all breakpoints in breakpoint view)
• question mark next to breakpoint: a condition is active for this breakpoint (look under properties of the breakpoint)

The tick means that the breakpoint has been successfully set. I think it may only appear when you're doing remote debugging; when you add a breakpoint, it starts out as a plain ball, but once the JPDA agent in the remote system has been told about it, and has confirmed it's set, then it gets a tick.

I have created an example code with explanation inline.

public class Breakpoints {
    int field1; // watchpoint - suspend when field1 is read
    int field2; // watchpoint - suspend when field1 is written
    int field3; // watchpoint - suspend when field1 is read or written

    public void method() {
        int x;
        x = 10; // suspend before this line is executed 
        x = 11; // same as above but this breakpoint is temporarily disabled
        for (int i = 0; i < 100; i++) {
            x = i; // conditional breakpoint - suspend when i==5
        }
    }
}

Once you select Skip All Breakpoints in the Breakpoints view (Window | Show Viev | Debug | Breakpoints), all the icons become diagonally struck through like this:

I think answer given by @sleske is explaining all things except for :

Blue Ball with Tick : Breakpoint is successfully set because Your Source code matches with the Byte Code and debug control will reach there.

Only Blue Ball : Source code differs from Byte code (May be you are running a older Snapshot of code). Control will never reach at this breakpoint. You will have to update your JARs to get control to these breakpoints.

Adding to earlier answers. The small white c over a green ball icon means that the breakpoint is at the class level.

Eclipse Help

If you see a "T" on the blue ball, It means a triggering point for remote debugging

In Eclipse toolbar press Help > Help Contents

A new window will open, simply type JDT Icons. Select the result with the same name.

A list of icons with their respective meaning shaw appear. Scroll down until you find the Debugger section.