how to do a system pause in java for debugging?

Doing debugging is best done with a debugger, NetBeans (what you seem to be using if I look at other questions you have asked) has one. Just click in the left margin of an editor window to set a breakpoint and run the debugger. Program execution will stop at the breakpoint and you can have a look at the current state of variables, or step through the program line by line.

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