Identifying the jar to which a particular class belongs

This can come quite handy when working on java stack traces. Use the command below to identify the jar which shipped the particular class.


[root@nmk-centos-65-2 ~]# javap -classpath `hadoop classpath` -sysinfo org.apache.hadoop.conf.Configuration
Classfile jar:file:/opt/mapr/hadoop/hadoop-0.20.2/lib/hadoop-0.20.2-dev-core.jar!/org/apache/hadoop/conf/Configuration.class
  Last modified 29 Jan, 2014; size 35537 bytes
  MD5 checksum f1dc26ef7b8ee5aa93f9f1672d7229bd
  Compiled from "Configuration.java"
public class org.apache.hadoop.conf.Configuration implements java.lang.Iterable>, org.apache.hadoop.io.Writable {
  static final java.lang.String UNKNOWN_RESOURCE;
  public org.apache.hadoop.conf.Configuration();
  public org.apache.hadoop.conf.Configuration(boolean);
  public org.apache.hadoop.conf.Configuration(org.apache.hadoop.conf.Configuration);
  public static org.apache.hadoop.fs.Path getCachedCentralFilePath(org.apache.hadoop.fs.Path);
  public static void addRemoteResource(java.net.URI, boolean);
  public static void addDefaultResource(java.lang.String);
  public static void addDefaultResource(java.lang.String, java.lang.Object);
  public void addResource(java.lang.String);
  public void addResource(java.net.URL);
  public void addResource(org.apache.hadoop.fs.Path);
  public void addResource(java.io.InputStream);
  public synchronized void reloadConfiguration();
  public java.lang.String get(java.lang.String);
  public java.lang.String getTrimmed(java.lang.String);
  public java.lang.String getRaw(java.lang.String);
  public void set(java.lang.String, java.lang.String);
  public synchronized void unset(java.lang.String);
  public void setIfUnset(java.lang.String, java.lang.String);
  public java.lang.String get(java.lang.String, java.lang.String);
  public int getInt(java.lang.String, int);
  public void setInt(java.lang.String, int);
  public long getLong(java.lang.String, long);
  public void setLong(java.lang.String, long);
  public float getFloat(java.lang.String, float);
  public void setFloat(java.lang.String, float);
  public boolean getBoolean(java.lang.String, boolean);
  public void setBoolean(java.lang.String, boolean);
  public void setBooleanIfUnset(java.lang.String, boolean);
  public java.util.regex.Pattern getPattern(java.lang.String, java.util.regex.Pattern);
  public void setPattern(java.lang.String, java.util.regex.Pattern);
  public > void setEnum(java.lang.String, T);
  public > T getEnum(java.lang.String, T);
  public org.apache.hadoop.conf.Configuration$IntegerRanges getRange(java.lang.String, java.lang.String);
  public java.util.Collection getStringCollection(java.lang.String);
  public java.lang.String[] getStrings(java.lang.String);
  public java.lang.String[] getStrings(java.lang.String, java.lang.String...);
  public java.util.Collection getTrimmedStringCollection(java.lang.String);
  public java.lang.String[] getTrimmedStrings(java.lang.String);
  public java.lang.String[] getTrimmedStrings(java.lang.String, java.lang.String...);
  public void setStrings(java.lang.String, java.lang.String...);
  public java.lang.Class getClassByName(java.lang.String) throws java.lang.ClassNotFoundException;
  public java.lang.Class[] getClasses(java.lang.String, java.lang.Class...);
  public java.lang.Class getClass(java.lang.String, java.lang.Class);
  public java.lang.Class getClass(java.lang.String, java.lang.Class, java.lang.Class);
  public java.util.List getInstances(java.lang.String, java.lang.Class);
  public void setClass(java.lang.String, java.lang.Class, java.lang.Class);
  public org.apache.hadoop.fs.Path getLocalPath(java.lang.String, java.lang.String) throws java.io.IOException;
  public java.io.File getFile(java.lang.String, java.lang.String) throws java.io.IOException;
  public java.net.URL getResource(java.lang.String);
  public java.io.InputStream getConfResourceAsInputStream(java.lang.String);
  public java.io.Reader getConfResourceAsReader(java.lang.String);
  public int size();
  public void clear();
  public java.util.Iterator> iterator();
  public void writeXml(java.io.OutputStream) throws java.io.IOException;
  public void writeXml(java.io.Writer) throws java.io.IOException;
  public static void dumpConfiguration(org.apache.hadoop.conf.Configuration, java.io.Writer) throws java.io.IOException;
  public java.lang.ClassLoader getClassLoader();
  public void setClassLoader(java.lang.ClassLoader);
  public java.lang.String toString();
  public synchronized void setQuietMode(boolean);
  public static void main(java.lang.String[]) throws java.lang.Exception;
  public void readFields(java.io.DataInput) throws java.io.IOException;
  public void write(java.io.DataOutput) throws java.io.IOException;
  public java.util.Map getValByRegex(java.lang.String);
  public java.lang.String[] getLocalDirs();
  public int getIoFileBufferSize();
  static {};
}
[root@nmk-centos-65-2 ~]#