JDK 1.1 Source Code Directory
JDK 1.1 source code directory contains Java source code for JDK 1.1 core classes:
"C:\fyicenter\jdk-1.1.8\src".
Here is the list of Java classes of the JDK 1.1 source code:
✍: FYIcenter
⏎ java/lang/Runtime.java
/*
* @(#)Runtime.java 1.30 01/12/10
*
* Copyright 2002 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package java.lang;
import java.io.*;
import java.util.StringTokenizer;
/*
* Every Java application has a single instance of class
* <code>Runtime</code> that allows the application to interface with
* the environment in which the application is running. The current
* runtime can be obtained from the <code>getRuntime</code> method.
* <p>
* An application cannot create its own instance of this class.
*
* @author unascribed
* @version 1.30, 12/10/01
* @see java.lang.Runtime#getRuntime()
* @since JDK1.0
*/
public class Runtime {
private static Runtime currentRuntime = new Runtime();
/**
* Returns the runtime object associated with the current Java application.
*
* @return the <code>Runtime</code> object associated with the current
* Java application.
* @since JDK1.0
*/
public static Runtime getRuntime() {
return currentRuntime;
}
/** Don't let anyone else instantiate this class */
private Runtime() {}
/* Helper for exit
*/
private native void exitInternal(int status);
/**
* Terminates the currently running Java Virtual Machine. This
* method never returns normally.
* <p>
* If there is a security manager, its <code>checkExit</code> method
* is called with the status as its argument. This may result in a
* security exception.
* <p>
* The argument serves as a status code; by convention, a nonzero
* status code indicates abnormal termination.
*
* @param status exit status.
* @exception SecurityException if the current thread cannot exit with
* the specified status.
* @see java.lang.SecurityException
* @see java.lang.SecurityManager#checkExit(int)
* @since JDK1.0
*/
public void exit(int status) {
SecurityManager security = System.getSecurityManager();
if (security != null) {
security.checkExit(status);
}
exitInternal(status);
}
/**
* Enable or disable finalization on exit; doing so specifies that the
* finalizers of all objects that have finalizers that have not yet been
* automatically invoked are to be run before the Java runtime exits.
* By default, finalization on exit is disabled. An invocation of
* the runFinalizersOnExit method is permitted only if the caller is
* allowed to exit, and is otherwise rejected by the security manager.
* @see Runtime#gc
* @see Runtime#exit
* @since JDK1.1
*/
public static void runFinalizersOnExit(boolean value) {
SecurityManager security = System.getSecurityManager();
if (security != null) {
try { security.checkExit(0); }
catch (SecurityException e) {
throw new SecurityException("runFinalizersOnExit");
}
}
runFinalizersOnExit0(value);
}
/*
* Private variable holding the boolean determining whether to finalize
* on exit. The default value of the variable is false. See the comment
* on Runtime.runFinalizersOnExit for constraints on modifying this.
*/
private static native void runFinalizersOnExit0(boolean value);
/* Helper for exec
*/
private native Process execInternal(String cmdarray[], String envp[])
throws IOException;
/**
* Executes the specified string command in a separate process.
* <p>
* The <code>command</code> argument is parsed into tokens and then
* executed as a command in a separate process. This method has
* exactly the same effect as <code>exec(command, null)</code>.
*
* @param command a specified system command.
* @return a <code>Process</code> object for managing the subprocess.
* @exception SecurityException if the current thread cannot create a
* subprocess.
* @see java.lang.Runtime#exec(java.lang.String, java.lang.String[])
* @since JDK1.0
*/
public Process exec(String command) throws IOException {
return exec(command, null);
}
/**
* Executes the specified string command in a separate process with the
* specified environment.
* <p>
* This method breaks the <code>command</code> string into tokens and
* creates a new array <code>cmdarray</code> containing the tokens; it
* then performs the call <code>exec(cmdarray, envp)</code>.
*
* @param command a specified system command.
* @param envp array containing environment in format
* <i>name</i>=<i>value</i>
* @return a <code>Process</code> object for managing the subprocess.
* @exception SecurityException if the current thread cannot create a
* subprocess.
* @see java.lang.Runtime#exec(java.lang.String[], java.lang.String[])
* @since JDK1.0
*/
public Process exec(String command, String envp[]) throws IOException {
int count = 0;
String cmdarray[];
StringTokenizer st;
st = new StringTokenizer(command);
count = st.countTokens();
cmdarray = new String[count];
st = new StringTokenizer(command);
count = 0;
while (st.hasMoreTokens()) {
cmdarray[count++] = st.nextToken();
}
SecurityManager security = System.getSecurityManager();
if (security != null) {
security.checkExec(cmdarray[0]);
}
return execInternal(cmdarray, envp);
}
/**
* Executes the specified command and arguments in a separate process.
* <p>
* The command specified by the tokens in <code>cmdarray</code> is
* executed as a command in a separate process. This has exactly the
* same effect as <code>exec(cmdarray, null)</code>.
*
* @param cmdarray array containing the command to call and
* its arguments.
* @return a <code>Process</code> object for managing the subprocess.
* @exception SecurityException if the current thread cannot create a
* subprocess.
* @see java.lang.Runtime#exec(java.lang.String[], java.lang.String[])
* @since JDK1.0
*/
public Process exec(String cmdarray[]) throws IOException {
return exec(cmdarray, null);
}
/**
* Executes the specified command and arguments in a separate process
* with the specified environment.
* <p>
* If there is a security manager, its <code>checkExec</code> method
* is called with the first component of the array
* <code>cmdarray</code> as its argument. This may result in a security
* exception.
* <p>
* Given an array of strings <code>cmdarray</code>, representing the
* tokens of a command line, and an array of strings <code>envp</code>,
* representing an "environment" that defines system
* properties, this method creates a new process in which to execute
* the specified command.
*
* @param cmdarray array containing the command to call and
* its arguments.
* @param envp array containing environment in format
* <i>name</i>=<i>value</i>.
* @return a <code>Process</code> object for managing the subprocess.
* @exception SecurityException if the current thread cannot create a
* subprocess.
* @see java.lang.SecurityException
* @see java.lang.SecurityManager#checkExec(java.lang.String)
* @since JDK1.0
*/
public Process exec(String cmdarray[], String envp[]) throws IOException {
cmdarray = (String[])cmdarray.clone();
envp = (envp != null ? (String[])envp.clone() : null);
SecurityManager security = System.getSecurityManager();
if (security != null) {
security.checkExec(cmdarray[0]);
}
return execInternal(cmdarray, envp);
}
/**
* Returns the amount of free memory in the system. The value returned
* by this method is always less than the value returned by the
* <code>totalMemory</code> method. Calling the <code>gc</code> method may
* result in increasing the value returned by <code>freeMemory.</code>
*
* @return an approximation to the total amount of memory currently
* available for future allocated objects, measured in bytes.
* @since JDK1.0
*/
public native long freeMemory();
/**
* Returns the total amount of memory in the Java Virtual Machine.
*
* @return the total amount of memory currently available for allocating
* objects, measured in bytes.
* @since JDK1.0
*/
public native long totalMemory();
/**
* Runs the garbage collector.
* Calling this method suggests that the Java Virtual Machine expend
* effort toward recycling unused objects in order to make the memory
* they currently occupy available for quick reuse. When control
* returns from the method call, the Java Virtual Machine has made
* its best effort to recycle all unused objects.
* <p>
* The name <code>gc</code> stands for "garbage
* collector". The Java Virtual Machine performs this recycling
* process automatically as needed even if the <code>gc</code> method
* is not invoked explicitly.
*
* @since JDK1.0
*/
public native void gc();
/**
* Runs the finalization methods of any objects pending finalization.
* Calling this method suggests that the Java Virtual Machine expend
* effort toward running the <code>finalize</code> methods of objects
* that have been found to be discarded but whose <code>finalize</code>
* methods have not yet been run. When control returns from the
* method call, the Java Virtual Machine has made a best effort to
* complete all outstanding finalizations.
* <p>
* The Java Virtual Machine performs the finalization process
* automatically as needed if the <code>runFinalization</code> method
* is not invoked explicitly.
*
* @see java.lang.Object#finalize()
* @since JDK1.0
*/
public native void runFinalization();
/**
* Enables/Disables tracing of instructions.
* If the <code>boolean</code> argument is <code>true</code>, this
* method asks the Java Virtual Machine to print out a detailed trace
* of each instruction in the Java Virtual Machine as it is executed.
* The virtual machine may ignore this request if it does not support
* this feature. The destination of the trace output is system
* dependent.
* <p>
* If the <code>boolean</code> argument is <code>false</code>, this
* method causes the Java Virtual Machine to stop performing the
* detailed instruction trace it is performing.
*
* @param on <code>true</code> to enable instruction tracing;
* <code>false</code> to disable this feature.
* @since JDK1.0
*/
public native void traceInstructions(boolean on);
/**
* Enables/Disables tracing of method calls.
* If the <code>boolean</code> argument is <code>true</code>, this
* method asks the Java Virtual Machine to print out a detailed trace
* of each method in the Java Virtual Machine as it is called. The
* virtual machine may ignore this request if it does not support
* this feature. The destination of the trace output is system dependent.
* <p>
* If the <code>boolean</code> argument is <code>false</code>, this
* method causes the Java Virtual Machine to stop performing the
* detailed method trace it is performing.
*
* @param on <code>true</code> to enable instruction tracing;
* <code>false</code> to disable this feature.
* @since JDK1.0
*/
public native void traceMethodCalls(boolean on);
/**
* Initializes the linker and returns the search path for shared libraries.
*/
private synchronized native String initializeLinkerInternal();
private native String buildLibName(String pathname, String filename);
/* Helper for load and loadLibrary */
private native int loadFileInternal(String filename);
/** The paths searched for libraries */
private String paths[];
private void initializeLinker() {
String ldpath = initializeLinkerInternal();
char c = System.getProperty("path.separator").charAt(0);
int ldlen = ldpath.length();
int i, j, n;
// Count the separators in the path
i = ldpath.indexOf(c);
n = 0;
while (i >= 0) {
n++;
i = ldpath.indexOf(c, i+1);
}
// allocate the array of paths - n :'s = n + 1 path elements
paths = new String[n + 1];
// Fill the array with paths from the ldpath
n = i = 0;
j = ldpath.indexOf(c);
while (j >= 0) {
if (j - i > 0) {
paths[n++] = ldpath.substring(i, j);
} else if (j - i == 0) {
paths[n++] = ".";
}
i = j + 1;
j = ldpath.indexOf(c, i);
}
paths[n] = ldpath.substring(i, ldlen);
}
/**
* Loads the specified filename as a dynamic library. The filename
* argument must be a complete pathname.
* From <code>java_g</code> it will automagically insert "_g" before the
* ".so" (for example
* <code>Runtime.getRuntime().load("/home/avh/lib/libX11.so");</code>).
* <p>
* If there is a security manager, its <code>checkLink</code> method
* is called with the <code>filename</code> as its argument. This may
* result in a security exception.
*
* @param filename the file to load.
* @exception SecurityException if the current thread cannot load the
* specified dynamic library.
* @exception UnsatisfiedLinkError if the file does not exist.
* @see java.lang.Runtime#getRuntime()
* @see java.lang.SecurityException
* @see java.lang.SecurityManager#checkLink(java.lang.String)
* @since JDK1.0
*/
public synchronized void load(String filename) {
SecurityManager security = System.getSecurityManager();
int ret;
if (security != null) {
security.checkLink(filename);
}
ret = loadFileInternal(filename);
if (ret == -1) {
throw new OutOfMemoryError();
} else if (ret == 0) {
throw new UnsatisfiedLinkError(filename);
} /* else load was successful; return */
}
/**
* Loads the dynamic library with the specified library name. The
* mapping from a library name to a specific filename is done in a
* system-specific manner.
* <p>
* First, if there is a security manager, its <code>checkLink</code>
* method is called with the <code>filename</code> as its argument.
* This may result in a security exception.
* <p>
* If this method is called more than once with the same library
* name, the second and subsequent calls are ignored.
*
* @param libname the name of the library.
* @exception SecurityException if the current thread cannot load the
* specified dynamic library.
* @exception UnsatisfiedLinkError if the library does not exist.
* @see java.lang.SecurityException
* @see java.lang.SecurityManager#checkLink(java.lang.String)
* @since JDK1.0
*/
public synchronized void loadLibrary(String libname) {
SecurityManager security = System.getSecurityManager();
if (security != null) {
security.checkLink(libname);
}
if (paths == null) {
initializeLinker();
}
for (int i = 0 ; i < paths.length ; i++) {
int ret;
String tempname = buildLibName(paths[i], libname);
ret = loadFileInternal(tempname);
if (ret == -1) {
throw new OutOfMemoryError();
} else if (ret == 1) { // Loaded or found it already loaded
return;
}
}
// Oops, it failed
throw new UnsatisfiedLinkError("no " + libname +
" in shared library path");
}
/**
* Creates a localized version of an input stream. This method takes
* an <code>InputStream</code> and returns an <code>InputStream</code>
* equivalent to the argument in all respects except that it is
* localized: as characters in the local character set are read from
* the stream, they are automatically converted from the local
* character set to Unicode.
* <p>
* If the argument is already a localized stream, it may be returned
* as the result.
*
* @deprecated As of JDK 1.1, the preferred way translate a byte
* stream in the local encoding into a character stream in Unicode is via
* the <code>InputStreamReader</code> and <code>BufferedReader</code>
* classes.
*
* @return a localized input stream.
* @see java.io.InputStream
* @see java.io.BufferedReader#BufferedReader(java.io.Reader)
* @see java.io.InputStreamReader#InputStreamReader(java.io.InputStream)
*/
public InputStream getLocalizedInputStream(InputStream in) {
return in;
}
/**
* Creates a localized version of an output stream. This method
* takes an <code>OutputStream</code> and returns an
* <code>OutputStream</code> equivalent to the argument in all respects
* except that it is localized: as Unicode characters are written to
* the stream, they are automatically converted to the local
* character set.
* <p>
* If the argument is already a localized stream, it may be returned
* as the result.
*
* @deprecated As of JDK 1.1, the preferred way to translate a
* Unicode character stream into a byte stream in the local encoding is via
* the <code>OutputStreamWriter</code>, <code>BufferedWriter</code>, and
* <code>PrintWriter</code> classes.
*
* @return a localized output stream.
* @see java.io.OutputStream
* @see java.io.BufferedWriter#BufferedWriter(java.io.Writer)
* @see java.io.OutputStreamWriter#OutputStreamWriter(java.io.OutputStream)
* @see java.io.PrintWriter#PrintWriter(java.io.OutputStream)
*/
public OutputStream getLocalizedOutputStream(OutputStream out) {
return out;
}
}
⏎ java/lang/Runtime.java
Or download all of them as a single archive file:
File name: jdk-1.1.8-src.zip File size: 1574187 bytes Release date: 2018-11-16 Download
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