the index to insert at. obj Object the Object to insert. Returns StringBuilder Attributes RegisterAttribute Exceptions StringIndexOutOfBoundsException if offset is negative or greater than the current length
StringBuffer append();//添加;将指定数据作为参数添加到已有数据的结尾处; StringBuffer insert(index,数据);//插入;把数据插入到index位置; (2)删除: StringBuffer delete(strat,end);//删除;从start位,到end;包含头,不包含尾; StringBuffer deleteCharAt(index);//删除指定位置的字符; 清空: 1)sb=new Stri...
int codePointAt(int index) //获取index下标字符的Unicode编码 int codePointBefore(int index) int codePointCount(int start, int end) StringBuilder delete(int start, int end) //删除[start,end)之间的字符 StringBuilder deleteCharAt(int index) //删除index下标的字符 void getChars(int start, int end,...
StringBuffer insert(index,data):在指定位置插入数据。 2,删除。 StringBuffer delete(start,end);删除从start至end-1范围的元素 StringBuffer deleteCharAt(index);删除指定位置的元素 //sb.delete(0,sb.length());//清空缓冲区。 3,修改。 StringBuffer replace(start,end,string);将start至end-1替换成string...
2.char chaeAt():返回索引处(index)的字符 代码语言:javascript 代码运行次数:0 运行 AI代码解释 String s1="HelloWorld";System.out.println(s1.charAt(5));//W 3.boolean isEmpty():判断是否是空字符串 代码语言:javascript 代码运行次数:0 运行 ...
Insert(Int32, Char[], Int32, Int32) Source: StringBuilder.cs Inserts the string representation of a specified subarray of Unicode characters into this instance at the specified character position. C# Copy public System.Text.StringBuilder Insert(int index, char[]? value, int startIndex, int...
Insert(Int32, Char[], Int32, Int32) Source: StringBuilder.cs Inserts the string representation of a specified subarray of Unicode characters into this instance at the specified character position. C# Copy public System.Text.StringBuilder Insert(int index, char[]? value, int startIndex, int...
6.insert()方法:在指定索引位置之前插入字符串 StringBuffer s = new StringBuffer(); s.append("sad"); s.insert(0,'t'); System.out.println(s);//输出为:tsad 1. 2. 3. 4. 7.indexOf()方法:返回指定字符串的开始字符索引位置,还可以从某个字符索引位置开始向后匹配,没有找到匹配的就会返回-1...
int indexOf(String str, int fromIndex) Returns the index within this string of the first occurrence of the specified substring, starting at the specified index. StringBuilder insert(int offset, boolean b) Inserts the string representation of the boolean argument into this sequence. StringBuilder ...
System.out.println("Character at index 3: " + ch); // 根据字符串获取索引 int index = buffer.indexOf("World"); System.out.println("Index of 'World': " + index); } } 3)StringBuilder方法 与StringBuffer基本一样的方法,但它不是线程安全。单线程中推荐使用。文档及使用代码可以参考上面String...