StringBuffer 线程安全的可变字符序列. StringBuffer源码分析(JDK1.6): public final class StringBuffer extends AbstractStringBuilder implements java.io.Serializable, CharSequence StringBuffer类被final修饰,可知StringBuffer类不能被继承. StringBuffer中的大部分方法都有synchronized修饰.有些虽然没有syn…
目录 AbstractStringBuilder类 字段 构造器 方法 public abstract String toString() 扩充容量 void expandCapacity(int minimumCapacity) public int length() public int capacity() public void ensureCapacity(int minimumCapacity) 反转 public AbstractStringBuilder…
先贴一段描述:Qt文档原文: Detailed Description The QAction class provides an abstract user interface action that can be inserted into widgets. In applications many common commands can be invoked via menus, toolbar buttons, and keyboard shortcuts. Since the user…