Select the Suspend command [ ] to change the suspend policy of a breakpoint between suspending the entire VM and the thread in which the breakpoint suspended.
There is only one menu item visible at any one given time, showing you which suspend policy you will be changing to should you select it.
You can change the default suspend policy for all newly created breakpoints on the Java > Debug preference page.
Launching a Java program
Running and debugging
Breakpoint Suspend Policy Option