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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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