合成聚合复用原则想表达的是优先考虑Has-A关系而不是Is-A关系复用代码,原因嘛可以自己从百度上找到一万个理由,需要说明的是,即使在Java的API中也有不少滥用继承的例子,例如Properties类继承了Hashtable类,Stack类继承了Vector类,这些继承明显就是错误的,更好的做法是在Properties类中放置一个Hashtable类型的成员并且将...
If value is a string with spaces, then enclose it in quotation marks (for example -Dfoo="foo bar"). -d32 Runs the application in a 32-bit environment. If a 32-bit environment is not installed or is not supported, then an error will be reported. By default, the application is run...
classSubextendsSuper{Sub(Certificate certificate){super(prepareByteArray(certificate));}// 辅助方法privatestaticbyte[]prepareByteArray(Certificate certificate){varpublicKey=certificate.getPublicKey();if(publicKey==null)thrownewIllegalArgumentException("null certificate");returnswitch(publicKey){caseRSAKey rs...
Returns a hash code value for the object. (Inherited from Object) JavaFinalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. (Inherited from Object) Notify() Wakes up a single thread that is waiting on...
Java SE の概要 Java SE プラットフォーム・ファミリには、Java SE Runtime Environment (JRE)とJava Development Kit (JDK)の 2 つの主要製品があります。 Java Runtime Environment (JRE) Java Runtime Environment (JRE) は、Java プログラミング言語で記述されたアプレットやアプリケーション...
Data Structure and Algorithm is one of the essential topics for programmers, both to get a job and do well on Job. Good knowledge of data structure and algorithm is the foundation of writing good code. If you are familiar with essential data structures like anarray,string,linked list, tree...
Executes the main class in a module specified by mainclass if it is given, or, if it is not given, the value in the module. In other words, mainclass can be used when it is not specified by the module, or to override the value when it is specified. See Standard Options for Jav...
This API supports the Mono for Android infrastructure and is not intended to be used directly from your code. protected override IntPtr ThresholdClass { get; } Property Value IntPtr AIntPtrwhich contains thejava.lang.ClassJNI value corresponding to this type. ...
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public static final String IS_ICON_PROPERTY "icon" public static final String IS_MAXIMUM_PROPERTY "maximum" public static final String IS_SELECTED_PROPERTY "selected" public static final String LAYERED_PANE_PROPERTY "layeredPane" public static final String MENU_BAR_PROPERTY "JMenuBar" public static ...