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java.lang.Objectqdbm.Util
public class Util
Class of utility methods. This class depends on the native library `jqdbm'.
| Method Summary | |
|---|---|
| static int | chdir(java.lang.String path)Change current working directory using the native function `chdir' defined in POSIX. | 
| static java.lang.Object | deserialize(byte[] serial)Redintegrate a serialized object. | 
| static long | deserializeLong(byte[] serial)Redintegrate a serialized long integer. | 
| static java.lang.String | getcwd()Get current working directory using the native function `getcwd' defined in POSIX. | 
| static java.lang.String | getenv(java.lang.String name)Get an environment variable using the native function `getenv' defined in POSIX and ANSI C. | 
| static int | getpid()Get process identification using the native function `getpid' defined in POSIX. | 
| static java.lang.String | numstr(int num,
       int cols,
       char padding)Get a formatted decimal string made from a number. | 
| static byte[] | readFile(java.lang.String path)Read whole data of a file. | 
| static byte[] | serialize(java.lang.Object obj)Serialize an object. | 
| static byte[] | serializeLong(long num)Serialize a long integer. | 
| static int | system(java.lang.String cmd)Execute a shell command using the native function `system' defined in POSIX and ANSI C. | 
| static boolean | writeFile(java.lang.String path,
          byte[] data)Write whole data to a file. | 
| Methods inherited from class java.lang.Object | 
|---|
| clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait | 
| Method Detail | 
|---|
public static int chdir(java.lang.String path)
path - the path of a directory.
public static java.lang.Object deserialize(byte[] serial)
serial - a byte array of the serialized object.
public static long deserializeLong(byte[] serial)
                            throws java.lang.IllegalArgumentException
serial - a byte array of a serialized long integer.
java.lang.IllegalArgumentException - thrown if the size of the array is invalid.public static java.lang.String getcwd()
public static java.lang.String getenv(java.lang.String name)
name - the name of an environment variable.
public static int getpid()
public static java.lang.String numstr(int num,
                                      int cols,
                                      char padding)
num - a number.cols - the number of columns.  The result string may be longer than it.padding - a padding character to fulfil columns with.public static byte[] readFile(java.lang.String path)
path - the path of a file.
public static byte[] serialize(java.lang.Object obj)
obj - a serializable object.
public static byte[] serializeLong(long num)
num - a long integer.
public static int system(java.lang.String cmd)
cmd - a command line.
public static boolean writeFile(java.lang.String path,
                                byte[] data)
path - the path of a file.data - data to write.
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