与String类不同,StringBuilder的实例可以修改而不需要生成新的对象,这使得它在性能上更具优势。然而,许多初学者对StringBuilder的使用中一个重要的问题感到困惑:是否需要手动清空(clear)StringBuilder对象? StringBuilder的基本特性 StringBuilder类位于java.lang包中,提供了一组强大且灵活的方法来处理字符串。它的主要特点包括...
清空有3种方法: 1)新生成一个,旧的由系统自己主动回收 2)使用delete 3)使用setLength 将三种方法循环1000万次,代码: 1.public class sbbm { 2. 3. static String a; 4. static long time ; 5. public static void main( String[] args ) throws Exception { 6. 7. StringBuilder sb = new StringBu...
but I can't see any method similar to the .NETStringBuilder.Clearin the documentation, just thedeletemethod which seems overly complicated.我在循环中使用StringBuilder,每隔x次迭代,我想将其清空并从一个空的StringBuilder开始,但是在文档中看不到任何类似于.NETStringBuilder....
System.out.println("谁被修改了呢? "+ whoUpdate);//AAASystem.out.println("修改AAA后集合的内容: "+ list);//[A]//public void clear(): 清空集合元素list.clear(); System.out.println("集合元素个数: "+list.size());//0System.out.println("集合是否为空: "+list.isEmpty());//true} }...
{//Buff.Length = 0;//StringBuilder清空方法Buff.Clear();//QuickStringWriter清空方法AppendObject(obj);returnBuff.ToString(); } 完整代码: using System; using System.Collections.Generic; using System.Text; namespace blqw {publicclassQuickStringWriter : IDisposable ...
this.clear = function () { strings = []; };this.isEmpty = function () { return strings.length == 0; };this.toString = function () { return strings.join(""); };var verify = function (string) {if (!defined(string)) return "";...
It’s clear that StringBuilder performs better than StringBuffer even in the case of a single-threaded environment. This difference in performance can be caused by synchronization in StringBuffer methods. String vs StringBuffer vs StringBuilder ...
If we need to clear the current StringBuilder contents, we just need to use the .clear method, which would delete all the chars added so far:scala> println(sb) Example: MyExample(42) scala> println(sb) Example: MyExample(42) scala> sb.clear() scala> println(sb) //empty String will...
Clear() Convenience for replace(0, length(), "", 0, 0) ClearSpans() Removes all spans from the Editable, as if by calling RemoveSpan(Object) on each of them. Clone() Creates and returns a copy of this object. (Inherited from Object) Delete(Int32, Int32) Convenience for replac...
在.NET 3.5中,要再次使StringBuilder为空,可以使用其Clear()方法。以下是一个示例: 代码语言:csharp 复制 StringBuilder sb = new StringBuilder(); sb.Append("Hello, World!"); Console.WriteLine(sb.ToString()); // 输出:Hello, World! sb.Clear(); Console.WriteLine(sb.ToString()); // 输出:(空字...