[ https://issues.apache.org/jira/browse/JDO-780?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
XiangzheXu updated JDO-780: --------------------------- Description: In class org.apache.jdo.exectck.Utilities, the method `printClasspath()` could throw an unexpected NullPointerException. The related part of that method is shown as follows. ```java public void printClasspath() { //Get the System Classloader ClassLoader loader = ClassLoader.getSystemClassLoader(); //Get the URLs URL[] urls = ((URLClassLoader) loader).getURLs(); } ``` The invocation of `ClassLoader.getSystemClassLoader()` could return null in JDK 8, as is depicted in the Javadoc in its source code: @return The system <tt>ClassLoader</tt> for delegation, or <tt>null</tt> if none If that is the case, the invocation to `getURLs()` could cause a NullPointerException. Maybe we could check for null pointer here or mention the potential NullPointerException at the Javadoc? was: In class org.apache.jdo.exectck.Utilities, the method `printClasspath()` could throw an unexpected NullPointerException. The related part of that method is shown as follows. ```java public void printClasspath() { //Get the System Classloader ClassLoader loader = ClassLoader.getSystemClassLoader(); //Get the URLs URL[] urls = ((URLClassLoader) loader).getURLs(); } ``` The invocation of `ClassLoader.getSystemClassLoader()` could return null in JDK 8, as is depicted in the Javadoc in its source code: @return The system <tt>ClassLoader</tt> for delegation, or <tt>null</tt> if none If that is the case, the invocation to `getURLs()` could cause a NullPointerException. Maybe we could check for null pointer here or mention the potential NullPointerException at the Javadoc? > Potential NullPointerException in code > -------------------------------------- > > Key: JDO-780 > URL: https://issues.apache.org/jira/browse/JDO-780 > Project: JDO > Issue Type: Bug > Affects Versions: JDO 3.2 > Reporter: XiangzheXu > Priority: Major > Labels: NullPointerException > Original Estimate: 2h > Remaining Estimate: 2h > > In class org.apache.jdo.exectck.Utilities, the method `printClasspath()` > could throw an unexpected NullPointerException. > The related part of that method is shown as follows. > ```java > public void printClasspath() { > //Get the System Classloader > ClassLoader loader = ClassLoader.getSystemClassLoader(); > //Get the URLs > URL[] urls = ((URLClassLoader) loader).getURLs(); > } > ``` > The invocation of `ClassLoader.getSystemClassLoader()` could return null in > JDK 8, as is depicted in the Javadoc in its source code: > @return The system <tt>ClassLoader</tt> for delegation, or > <tt>null</tt> if none > If that is the case, the invocation to `getURLs()` could cause a > NullPointerException. > Maybe we could check for null pointer here or mention the potential > NullPointerException at the Javadoc? -- This message was sent by Atlassian Jira (v8.3.2#803003)