at my job i get no breaks is that even legal?

US federal law DOES NOT require breaks or lunches.

The ONLY breaks required by New Jersey law is 30 lunch break for each 5 consecutive hours worked if the employee is under 18.

That would depend on where you live. There is no federal law reguarding breaks and in many states such as Georgia there are no laws regulating breaks or meal breaks.

Under federal law, yes. Under the laws of the state you did not mention, no one knows.

Update to yours:  For adults, New Jersey follows federal law, meaning there is no law. For 18 and under, New Jersey requires a 30-minute break after 5 hours of consecutive work.

I don't think so, but call the Department of Labor and ask them for help.

This is STATE law, not FEDERAL law.  Where?

All depends on what state you are in and how long the shift is.

https://www.workplacefairness.org/meal-rest-breaks...

Check the office for the signs that they are required to post. There are numbers you can call if you think a business is breaking the law. It will say you can submit your inquiry/complaint anonymously so it's up to you if you want to give them your personal information.