java how to exit loop

public class Test {

   public static void main(String args[]) {
      int [] numbers = {10, 20, 30, 40, 50};

      for(int x : numbers ) {
         if( x == 30 ) {
            break;
         }
         System.out.print( x );
         System.out.print("\n");
      }
   }
}

//how to exit loop in java
while (true) {
    if (obj == null) {
        break;
    }
}

	  int [] numbers = {10, 20, 30, 40, 50};
      for(int x : numbers ) {
         if( x == 30 ) {
            break;
         }
         System.out.print( x );
      }
   }
}