I downloaded the source (v 0.9.1.2) and tried to build it, first from the command line, and then inside the IDE.
I think the problem is setting the classpath in the build.properties file. Here is my current class path. Of course, I tried different things here, but all give the same results:
j2ee.classpath=C:/glassfishv3/glassfish/lib/j2ee.jar and tried: j2ee.jar.base.dir=C:/glassfishv3/glassfish/lib etc.
Here are the errors I get:
init-codegen: [javac] Compiling 6 source files to C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\build\classes beangen: [echo] Some warnings are expected here. Don't worry about them. newproxygen: codegen: compile-common: [javac] Compiling 222 source files to C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\build\classes [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\build\codegen\com\mchange\v2\c3p0\impl\NewProxyConnection.jav a:1339: unreported exception java.sql.SQLException; must be caught or declared to be thrown [javac] throw SqlUtils.toSQLException("You can't operate on a closed Connection!!!", exc ); [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\build\codegen\com\mchange\v2\c3p0\impl\NewProxyConnection.jav a:1347: unreported exception java.sql.SQLException; must be caught or declared to be thrown [javac] throw parentPooledConnection.handleThrowable( exc ); [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\build\codegen\com\mchange\v2\c3p0\impl\NewProxyConnection.jav a:1349: unreported exception java.sql.SQLException; must be caught or declared to be thrown [javac] else throw SqlUtils.toSQLException( exc ); [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\build\codegen\com\mchange\v2\c3p0\impl\NewProxyConnection.jav a:1365: unreported exception java.sql.SQLException; must be caught or declared to be thrown [javac] throw SqlUtils.toSQLException("You can't operate on a closed Connection!!!", exc ); [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\build\codegen\com\mchange\v2\c3p0\impl\NewProxyConnection.jav a:1373: unreported exception java.sql.SQLException; must be caught or declared to be thrown [javac] throw parentPooledConnection.handleThrowable( exc ); [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\build\codegen\com\mchange\v2\c3p0\impl\NewProxyConnection.jav a:1375: unreported exception java.sql.SQLException; must be caught or declared to be thrown [javac] else throw SqlUtils.toSQLException( exc ); [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\impl\NewPooledConnection.java :38: com.mchange.v2.c3p0.impl.NewPooledConnection is not abstract and does not override abstract method removeStatementE ventListener(javax.sql.StatementEventListener) in javax.sql.PooledConnection [javac] public final class NewPooledConnection extends AbstractC3P0PooledConnection{ [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\ComboPooledDataSource.java:42 : com.mchange.v2.c3p0.ComboPooledDataSource is not abstract and does not override abstract method isWrapperFor(java.lang .Class) in java.sql.Wrapper [javac] public final class ComboPooledDataSource extends AbstractPoolBackedDataSource implements PooledDataSource, S erializable, Referenceable [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\DriverManagerDataSource.java: 45: com.mchange.v2.c3p0.DriverManagerDataSource is not abstract and does not override abstract method isWrapperFor(java. lang.Class) in java.sql.Wrapper [javac] public final class DriverManagerDataSource extends DriverManagerDataSourceBase implements DataSource [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\JndiRefForwardingDataSource.j ava:47: com.mchange.v2.c3p0.JndiRefForwardingDataSource is not abstract and does not override abstract method isWrapperF or(java.lang.Class) in java.sql.Wrapper [javac] final class JndiRefForwardingDataSource extends JndiRefDataSourceBase implements DataSource [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\PoolBackedDataSource.java:28: com.mchange.v2.c3p0.PoolBackedDataSource is not abstract and does not override abstract method isWrapperFor(java.lang.C lass) in java.sql.Wrapper [javac] public final class PoolBackedDataSource extends AbstractPoolBackedDataSource implements PooledDataSource [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\impl\C3P0PooledConnection.jav a:39: com.mchange.v2.c3p0.impl.C3P0PooledConnection is not abstract and does not override abstract method removeStatemen tEventListener(javax.sql.StatementEventListener) in javax.sql.PooledConnection [javac] public final class C3P0PooledConnection extends AbstractC3P0PooledConnection [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\impl\C3P0PooledConnection.jav a:503: com.mchange.v2.c3p0.impl.C3P0PooledConnection.StatementProxyingSetManagedResultSet is not abstract and does not o verride abstract method updateNClob(java.lang.String,java.io.Reader) in java.sql.ResultSet [javac] private static class StatementProxyingSetManagedResultSet extends SetManagedResultSet [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\impl\C3P0PooledConnection.jav a:618: ProxyCallableStatement is not abstract and does not override abstract method setNClob(java.lang.String,java.io.Re ader) in java.sql.CallableStatement [javac] class ProxyCallableStatement extends FilterCallableStatement implements C3P0ProxyStatement [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\impl\C3P0PooledConnection.jav a:655: ProxyPreparedStatement is not abstract and does not override abstract method setNClob(int,java.io.Reader) in java .sql.PreparedStatement [javac] class ProxyPreparedStatement extends FilterPreparedStatement implements C3P0ProxyStatement [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\impl\C3P0PooledConnection.jav a:692: ProxyStatement is not abstract and does not override abstract method isPoolable() in java.sql.Statement [javac] class ProxyStatement extends FilterStatement implements C3P0ProxyStatement [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\impl\NullStatementSetManagedR esultSet.java:37: com.mchange.v2.c3p0.impl.NullStatementSetManagedResultSet is not abstract and does not override abstra ct method updateNClob(java.lang.String,java.io.Reader) in java.sql.ResultSet [javac] final class NullStatementSetManagedResultSet extends SetManagedResultSet [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\impl\SetManagedDatabaseMetaDa ta.java:30: com.mchange.v2.c3p0.impl.SetManagedDatabaseMetaData is not abstract and does not override abstract method ge tFunctionColumns(java.lang.String,java.lang.String,java.lang.String,java.lang.String) in java.sql.DatabaseMetaData [javac] final class SetManagedDatabaseMetaData extends FilterDatabaseMetaData [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\impl\SnatchFromSetResultSet.j ava:30: com.mchange.v2.c3p0.impl.SnatchFromSetResultSet is not abstract and does not override abstract method updateNClo b(java.lang.String,java.io.Reader) in java.sql.ResultSet [javac] final class SnatchFromSetResultSet extends FilterResultSet [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\test\FreezableDriverManagerDa taSource.java:49: com.mchange.v2.c3p0.test.FreezableDriverManagerDataSource is not abstract and does not override abstra ct method isWrapperFor(java.lang.Class) in java.sql.Wrapper [javac] public final class FreezableDriverManagerDataSource extends DriverManagerDataSourceBase implements DataSourc e [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\util\CloseReportingConnection Wrapper.java:29: com.mchange.v2.c3p0.util.CloseReportingConnectionWrapper is not abstract and does not override abstract method createStruct(java.lang.String,java.lang.Object[]) in java.sql.Connection [javac] public class CloseReportingConnectionWrapper extends FilterConnection [javac] ^ [javac] Note: Some input files use or override a deprecated API. [javac] Note: Recompile with -Xlint:deprecation for details. [javac] 21 errors BUILD FAILED C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\build.xml:256: Compile failed; see the compiler error output for details.
EDIT: Here are the errors I get when creating using Java 5:
compile-common: [javac] Compiling 226 source files to C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\build\classes [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\impl\NewPooledConnection.jav :38: com.mchange.v2.c3p0.impl.NewPooledConnection is not abstract and does not override abstract method removeStatement ventListener(javax.sql.StatementEventListener) in javax.sql.PooledConnection [javac] public final class NewPooledConnection extends AbstractC3P0PooledConnection{ [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\ComboPooledDataSource.java:4 : com.mchange.v2.c3p0.ComboPooledDataSource is not abstract and does not override abstract method isWrapperFor(java.lan .Class) in java.sql.Wrapper [javac] public final class ComboPooledDataSource extends AbstractPoolBackedDataSource implements PooledDataSource, erializable, Referenceable [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\DriverManagerDataSource.java 45: com.mchange.v2.c3p0.DriverManagerDataSource is not abstract and does not override abstract method isWrapperFor(java lang.Class) in java.sql.Wrapper [javac] public final class DriverManagerDataSource extends DriverManagerDataSourceBase implements DataSource [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\JndiRefForwardingDataSource. ava:47: com.mchange.v2.c3p0.JndiRefForwardingDataSource is not abstract and does not override abstract method isWrapper or(java.lang.Class) in java.sql.Wrapper [javac] final class JndiRefForwardingDataSource extends JndiRefDataSourceBase implements DataSource [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\PoolBackedDataSource.java:28 com.mchange.v2.c3p0.PoolBackedDataSource is not abstract and does not override abstract method isWrapperFor(java.lang. lass) in java.sql.Wrapper [javac] public final class PoolBackedDataSource extends AbstractPoolBackedDataSource implements PooledDataSource [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\impl\C3P0PooledConnection.ja a:39: com.mchange.v2.c3p0.impl.C3P0PooledConnection is not abstract and does not override abstract method removeStateme tEventListener(javax.sql.StatementEventListener) in javax.sql.PooledConnection [javac] public final class C3P0PooledConnection extends AbstractC3P0PooledConnection [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\impl\C3P0PooledConnection.ja a:503: com.mchange.v2.c3p0.impl.C3P0PooledConnection.StatementProxyingSetManagedResultSet is not abstract and does not verride abstract method updateNClob(java.lang.String,java.io.Reader) in java.sql.ResultSet [javac] private static class StatementProxyingSetManagedResultSet extends SetManagedResultSet [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\impl\C3P0PooledConnection.ja a:618: ProxyCallableStatement is not abstract and does not override abstract method setNClob(java.lang.String,java.io.R ader) in java.sql.CallableStatement [javac] class ProxyCallableStatement extends FilterCallableStatement implements C3P0ProxyStatement [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\impl\C3P0PooledConnection.ja a:655: ProxyPreparedStatement is not abstract and does not override abstract method setNClob(int,java.io.Reader) in jav .sql.PreparedStatement [javac] class ProxyPreparedStatement extends FilterPreparedStatement implements C3P0ProxyStatement [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\impl\C3P0PooledConnection.ja a:692: ProxyStatement is not abstract and does not override abstract method isPoolable() in java.sql.Statement [javac] class ProxyStatement extends FilterStatement implements C3P0ProxyStatement [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\impl\NullStatementSetManaged esultSet.java:37: com.mchange.v2.c3p0.impl.NullStatementSetManagedResultSet is not abstract and does not override abstr ct method updateNClob(java.lang.String,java.io.Reader) in java.sql.ResultSet [javac] final class NullStatementSetManagedResultSet extends SetManagedResultSet [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\impl\SetManagedDatabaseMetaD ta.java:30: com.mchange.v2.c3p0.impl.SetManagedDatabaseMetaData is not abstract and does not override abstract method g tFunctionColumns(java.lang.String,java.lang.String,java.lang.String,java.lang.String) in java.sql.DatabaseMetaData [javac] final class SetManagedDatabaseMetaData extends FilterDatabaseMetaData [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\impl\SnatchFromSetResultSet. ava:30: com.mchange.v2.c3p0.impl.SnatchFromSetResultSet is not abstract and does not override abstract method updateNCl b(java.lang.String,java.io.Reader) in java.sql.ResultSet [javac] final class SnatchFromSetResultSet extends FilterResultSet [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\test\FreezableDriverManagerD taSource.java:49: com.mchange.v2.c3p0.test.FreezableDriverManagerDataSource is not abstract and does not override abstr ct method isWrapperFor(java.lang.Class) in java.sql.Wrapper [javac] public final class FreezableDriverManagerDataSource extends DriverManagerDataSourceBase implements DataSour e [javac] ^ [javac] C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\src\classes\com\mchange\v2\c3p0\util\CloseReportingConnectio Wrapper.java:29: com.mchange.v2.c3p0.util.CloseReportingConnectionWrapper is not abstract and does not override abstrac method createStruct(java.lang.String,java.lang.Object[]) in java.sql.Connection [javac] public class CloseReportingConnectionWrapper extends FilterConnection [javac] ^ [javac] Note: Some input files use or override a deprecated API. [javac] Note: Recompile with -Xlint:deprecation for details. [javac] 15 errors BUILD FAILED C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src\build.xml:256: Compile failed; see the compiler error output for details Total time: 15 seconds C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src>java -version java version "1.5.0_22" Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_22-b03) Java HotSpot(TM) Client VM (build 1.5.0_22-b03, mixed mode, sharing) C:\downloads\c3p0-0.9.1.2.src\c3p0-0.9.1.2.src>