Is there a limit on the maximum of number of lines

I have a simple main method which includes dozens of "System.out.print" as depicted below:

public class StudentTester
{
    public static void main()
    {

        System.out.print('\f');

        System.out.println("1");
        System.out.println("2");
        System.out.println("3");
        System.out.println("4");
        System.out.println("5");
        System.out.println("6");
        System.out.println("7");
        System.out.println("8");
        System.out.println("9");
        System.out.println("10");
        System.out.println("11");
        System.out.println("12");
        System.out.println("13");
        System.out.println("14");
        System.out.println("15");
        System.out.println("16");
        System.out.println("17");
        System.out.println("18");
        System.out.println("19");
        System.out.println("20");
        System.out.println("21");
        System.out.println("22");
        System.out.println("23");
        System.out.println("24");
        System.out.println("25");
        System.out.println("26");
        System.out.println("27");
        System.out.println("28");
        System.out.println("29");
        System.out.println("30");
        System.out.println("31");
        System.out.println("32");
        System.out.println("33");
        System.out.println("34");
        System.out.println("35");
        System.out.println("36");
        System.out.println("37");
        System.out.println("38");
        System.out.println("39");
        System.out.println("40");
        System.out.println("41");
        System.out.println("42");
        System.out.println("43");
        System.out.println("44");
        System.out.println("45");
        System.out.println("46");
        System.out.println("47");
        System.out.println("48");
        System.out.println("49");
        System.out.println("50");
        System.out.println("51");
        System.out.println("52");
        System.out.println("53");
        System.out.println("54");
        System.out.println("55");
        System.out.println("56");
        System.out.println("57");
        System.out.println("58");
        System.out.println("59");        
        System.out.println("60");
        System.out.println("61");
        System.out.println("62");
        System.out.println("63");
        System.out.println("64");
        System.out.println("65");
        System.out.println("66");
        System.out.println("67");
        System.out.println("68");
        System.out.println("69");
        System.out.println("70");

}

However, when I run the program, BlueJ shows ONLY 24-70.

Why?

In the BlueJ terminal window Go to Options and turn on Unlimited Buffering. This will solve your problem. You may also turn on Clear Screen at method calls to make each program run on a clear screen.