下面是一个使用deleteCharAt方法删除最后一个字符的示例代码: publicclassDeleteLastCharacterExample{publicstaticvoidmain(String[]args){Stringstr="Hello World!";StringBuilderstringBuilder=newStringBuilder(str);// 删除最后一个字符stringBuilder.deleteCharAt(stringBuilder.length()-1);System.out.println("删除最后一个...
StringBuilder sb=newStringBuilder("春眠不觉晓,处处闻啼鸟。");sb.replace(8,11,"蚊子咬");System.out.println(sb);// 输出结果为:春眠不觉晓,处处蚊子咬。 void delete(int start, int end) 根据索引删减某部分。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 StringBuilder sb=newStringBuilder("...
和String类不同的是,StringBuffer和StringBuilder类的对象能够被多次修改,长度可变并且不产生新的未使用对象 StringBuilder不是线程安全的(不能同步访问),但相较于StringBuffer有速度优势,多数情况下建议使用 publicclassTest{publicstaticvoidmain(Stringargs[]) {StringBuffersBuffer =newStringBuffer("Hello,"); sBuffer...
int lastIndexOf(string,int fromIndex); 从指定的索引开始反向搜索 5,获取子串。 string substring(start); 返回start到结尾的子串 string substring(start,end); 返回start至end-1的子串 6,反转。 StringBuffer reverse();字符串反转 StringBuilder字符串缓冲区: JDK1.5出现StringBuiler;构造一个其中不带字符的字符...
.collect(StringBuilder::new, StringBuilder::appendCodePoint, StringBuilder::append) .toString(); } As we can see, we used thelimit(text.length()-1)method to tell the stream to ignore and delete the last character. Apache Commons Lang3 Library ...
Deletes the character at the specified index. shifts any remaining characters to the left. C# 复制 [Android.Runtime.Register("deleteCharAt", "(I)Ljava/lang/StringBuilder;", "")] public Java.Lang.StringBuilder DeleteCharAt (int index); Parameters index Int32 the index of the character to ...
StringBuilder public StringBuilder(int capacity) 构造一个不包含字符的字符串构建器以及 capacity参数指定的初始容量。 参数 capacity - 初始容量。 异常 NegativeArraySizeException - 如果 capacity参数小于 0。 StringBuilder public StringBuilder(String str) 构造一个初始化为指定字符串内容的字符串构建...
StringBuilder insert(int offset, Object obj) Inserts the string representation of the Object argument into this character sequence. StringBuilder insert(int offset, String str) Inserts the string into this character sequence. int lastIndexOf(String str) Returns the index within this string of th...
CompareTo(StringBuilder) Compares two StringBuilder instances lexicographically. Delete(Int32, Int32) Deletes a sequence of characters specified by start and end. DeleteCharAt(Int32) Deletes the character at the specified index. shifts any remaining characters to the left. Dispose() (Inherited ...
通常情况下,如果创建一个内容可变的字符串对象,应该优先考虑StringBuilder类。 StringBuilder类同样提供了一系列的追加(append)、插入(insert)、替换(replace)和删除(delete)的方法。如果将文件1中的StringBuffer换成StringBuilder,程序同样可以正确执行。 System类与Runtime类 System类 System类对于读者来说并不陌生,因为在...