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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Frameset//EN""http://www.w3.org/TR/REC-html40/frameset.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc on Fri Sep 27 14:47:28 CDT 2002 --><TITLE>Mobile Information Device Profile 2.0: Package java.lang</TITLE><LINK REL ="stylesheet" TYPE="text/css" HREF="../../stylesheet.css" TITLE="Style"></HEAD><BODY BGCOLOR="white"><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_top"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Package</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <FONT CLASS="NavBarFont1">Class</FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-use.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM><strong>MIDP 2.0</strong></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> PREV PACKAGE <A HREF="../../java/util/package-summary.html"><B>NEXT PACKAGE</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../index.html" TARGET="_top"><B>FRAMES</B></A> <A HREF="package-summary.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD></TR></TABLE><!-- =========== END OF NAVBAR =========== --><HR><H2>Package java.lang</H2>MID Profile Language Classes included from Java 2 Standard Edition.<P><B>See: </B><BR> <A HREF="#package_description"><B>Description</B></A><P><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Interface Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><I>Runnable</I></B></TD><TD>The <code>Runnable</code> interface should be implemented by any class whose instances are intended to be executed by a thread.</TD></TR></TABLE> <P><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Class Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>Boolean</B></TD><TD>The Boolean class wraps a value of the primitive type <code>boolean</code> in an object.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>Byte</B></TD><TD>The Byte class is the standard wrapper for byte values.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>Character</B></TD><TD>The Character class wraps a value of the primitive type <code>char</code> in an object.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>Class</B></TD><TD>Instances of the class <code>Class</code> represent classes and interfaces in a running Java application.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>Integer</B></TD><TD>The Integer class wraps a value of the primitive type <code>int</code> in an object.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>Long</B></TD><TD>The Long class wraps a value of the primitive type <code>long</code> in an object.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>Math</B></TD><TD>The class <code>Math</code> contains methods for performing basic numeric operations.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>Object</B></TD><TD>Class <code>Object</code> is the root of the class hierarchy.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>Runtime</B></TD><TD>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.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>Short</B></TD><TD>The Short class is the standard wrapper for short values.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>String</B></TD><TD>The <code>String</code> class represents character strings.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>StringBuffer</B></TD><TD>A string buffer implements a mutable sequence of characters.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>System</B></TD><TD>The <code>System</code> class contains several useful class fields and methods.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>Thread</B></TD><TD>A <i>thread</i> is a thread of execution in a program.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>Throwable</B></TD><TD>The <code>Throwable</code> class is the superclass of all errors and exceptions in the Java language.</TD></TR></TABLE> <P><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Exception Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>ArithmeticException</B></TD><TD>Thrown when an exceptional arithmetic condition has occurred.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>ArrayIndexOutOfBoundsException</B></TD><TD>Thrown to indicate that an array has been accessed with an illegal index.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>ArrayStoreException</B></TD><TD>Thrown to indicate that an attempt has been made to store the wrong type of object into an array of objects.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>ClassCastException</B></TD><TD>Thrown to indicate that the code has attempted to cast an object to a subclass of which it is not an instance.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>ClassNotFoundException</B></TD><TD>Thrown when an application tries to load in a class through its string name using: The <code>forName</code> method in class <code>Class</code>.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>Exception</B></TD><TD>The class <code>Exception</code> and its subclasses are a form of <code>Throwable</code> that indicates conditions that a reasonable application might want to catch.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>IllegalAccessException</B></TD><TD>Thrown when an application tries to load in a class, but the currently executing method does not have access to the definition of the specified class, because the class is not public and in another package.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>IllegalArgumentException</B></TD><TD>Thrown to indicate that a method has been passed an illegal or inappropriate argument.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>IllegalMonitorStateException</B></TD><TD>Thrown to indicate that a thread has attempted to wait on an object's monitor or to notify other threads waiting on an object's monitor without owning the specified monitor.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="IllegalStateException.html">IllegalStateException</A></B></TD><TD>Signals that a method has been invoked at an illegal or inappropriate time.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>IllegalThreadStateException</B></TD><TD>Thrown to indicate that a thread is not in an appropriate state for the requested operation.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>IndexOutOfBoundsException</B></TD><TD>Thrown to indicate that an index of some sort (such as to an array, to a string, or to a vector) is out of range.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>InstantiationException</B></TD><TD>Thrown when an application tries to create an instance of a class using the <code>newInstance</code> method in class <code>Class</code>, but the specified class object cannot be instantiated because it is an interface or is an abstract class.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>InterruptedException</B></TD><TD>Thrown when a thread is waiting, sleeping, or otherwise paused for a long time and another thread interrupts it using the <code>interrupt</code> method in class <code>Thread</code>.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>NegativeArraySizeException</B></TD><TD>Thrown if an application tries to create an array with negative size.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>NullPointerException</B></TD><TD>Thrown when an application attempts to use <code>null</code> in a case where an object is required.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>NumberFormatException</B></TD><TD>Thrown to indicate that the application has attempted to convert a string to one of the numeric types, but that the string does not have the appropriate format.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>RuntimeException</B></TD><TD><code>RuntimeException</code> is the superclass of those exceptions that can be thrown during the normal operation of the Java Virtual Machine.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B>SecurityException</B></TD><TD>Thrown by the security manager to indicate a security violation.</TD>⌨️ 快捷键说明
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