What different breakpoint icons mean in Eclipse?

When working with breakpoints in Eclipse I sometimes notice that they 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:

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

Eclipse Help

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.

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.