Who could help me

Question

who might kindly help me,
I can correctly compile my whole project in Eclipse,but I can not compile with single .java file with javac command under DOS.
what causes this problem?

Answer 1

I have not any error in my program, the only problem is that-- I couldn't call any function called setTest() added today and had compiled correctly. when the code runs on the following line that were called the function setTest(), the exception ocurred..
objCell.setTest();///exectpion occurred.....below
java.lang.NoSuchMethodError: llreport.API.ICell.setTest()V
at llreport.testing.Frame1.fillArea(Frame1.java:426)
at llreport.testing.Frame1.generateReport(Frame1.java:82)
at llreport.testing.Frame1.fillReport(Frame1.java:45)
at llreport.testing.Frame1.<init>(Frame1.java:37)
at llreport.testing.Frame1.main(Frame1.java:438)
//*************partion of source
public class Cell implements ICellTypeChange,ICell{
public Cell(){
---this function is added today
public void setTest(){
System.out.println("sdf");
....................//other function had been made any days before
}