Compiling java code in Jenkins get error: incompatible types

Question

I configed Jenkins to compile and build java project. But I got the below error

[javac] C:\Users\Administrator\.jenkins\workspace\AMRM\AMRM-rad-workspace\AMRM\src\com\bidv\amrm\struts2\jdbc\DeclareAppImpl.java:232: error: incompatible types
    [javac]                   return DB.getConnection().queryForObject(sql, new Object[]{id}, new DTOMapper());
    [javac]                                                           ^
    [javac]   required: ListAppDTO
    [javac]   found:    Object

I found a solution to fix is adding the line: @SuppressWarnings("unchecked") before relate function in java code

But, are there any other solution ? Such as config in Jenkins ? I don't want to change my code, because My project still compiled success in Eclipse (but error in Jenkins)

This really has nothing to do with Jenkins but all with the Java program you are trying to compile. Are you using the same language version on both? — Henry, Jan 04 '18 at 10:56
What is the signature of the method `DB.getConnection().queryForObject()` ? — Bentaye, Jan 04 '18 at 11:03
Is the Java (version) running in Jenkins machine and development machine are same? — Vishwa Dany, Jan 04 '18 at 12:14
The question doesn't show sufficient information about the program in order to give precise answers, but we can see two things: (1) Eclipse and javac give different answers (which version of each??) and (2) the program involves raw types / unchecked conversions. JLS rules about raw types are quite tricky and both compilers are known to have bugs in this area, some have been fixed between versions, but most importantly: Java programmers should strictly refrain from using raw types. So, as long as your program uses `@SuppressWarnings("unchecked")` it can and should be improved. — Stephan Herrmann, Jan 05 '18 at 10:56
In Eclipse, my project used Java 1.6 for compiler. In jenkins, I tried to config jdk 1.6, 1.7, 1.8 but still error — taibc, Jan 08 '18 at 02:19
I also got error with this function: @SuppressWarnings("unchecked") @Override public ChiNhanhHoiSoChinhDTO getChiNhanhHoiSoChinhDTOById(int id) { try { String strSelect = "SELECT ID, MACHINHANH, TENCHINHANH, TENVIETTAT, SODIENTHOAI FROM DANHSACH_CN_HSC WHERE ID = ?"; return DB.getConnection().queryForObject(strSelect, new Object[] { id }, new ChiNhanhHoiSoChinhDTOMapper()); } catch (Exception ex) { System.out.println(ex.toString()); } return null; } — taibc, Jan 08 '18 at 12:35

taibc · Answer 1 · 2018-01-09T03:34:05.577

I found the reason, it is because my jenkins still use a different java version.

So I pass the correct version (1.6) into build statement javac, then it is successful (java.home = C:\Program Files\Java\jdk1.6.0_23)

<javac fork="yes" executable="${java.home}\bin\javac" includeantruntime="false" encoding="utf-8" srcdir="${workspace}/${project.name}/src" destdir="${workspace}/${project.name}/WebContent/WEB-INF/classes" classpath="${was_cp}">
        </javac>

But, I got another error:

Caused by: java.io.IOException: Cannot run program "C:\java1.6\bin\javac": CreateProcess error=206, The filename or extension is too long.

Compiling java code in Jenkins get error: incompatible types

1 Answers1