StringBuilder Insert(int dstOffset, string? s, int start, int end); Parameters dstOffset Int32 s String start Int32 end Int32 Returns StringBuilder Remarks Java documentation for java.lang.StringBuilder.insert(int, java.lang.CharSequence, int, int). Portions of this page are ...
StringBuffer Insert (int dstOffset, string? s, int start, int end); Parameters dstOffset Int32 s String start Int32 end Int32 Returns StringBuffer Remarks Added in 1.5. Java documentation for java.lang.StringBuffer.insert(int, java.lang.CharSequence, int, int). Portions of this ...
StringBuilder insert(int offset, char[] ch) StringBuilder insert(int offset, char[] str, int strOffset, int strLen) StringBuilder insert(int offset, String str) StringBuilder insert(int offset, Object obj) StringBuilder insert(int offset, CharSequence s) StringBuilder insert(int offset, CharSequenc...
The principal operations on a StringBuilder are the append and insert methods, which are overloaded so as to accept data of any type. Each effectively converts a given datum to a string and then appends or inserts the characters of that string to the string builder. The append method always...
Method2: substring(int beginIndex, int endIndex) 返回从起始位置(beginIndex)到目标位置(endIndex)之间的字符串,但不包含目标位置(endIndex)的字符 str.substring(2,4); //return “ll”; 1. 2. 3. 4. 5. 6. 7. 8. 9. StringBuilder的常用方法 ...
StringBuilder与StringBuffer append添加 delete(x,y)删除下标x到y位置上的字符 deleteCharAt删除指定下标的字符 insert(x,s)在小标x位置插入s replace(x,y,str)将下标x到y替换为str setCharAt替换指定位置下的字符 charAt查看指定下标下的字符 substring(x,y)截取下标x到y下的字符串 ...
public static void method_1(String s1,String s2){ s1.replace('a','k'); s1 = s2; } public static void method_2(StringBuilder s1,StringBuilder s2){ s1.append(s2); s1 = s2; } } --- 基本数据类型对象包装类:是按照面向对象思想将基本数据类型封装成了对象。 好处: 1:可以...
Unless otherwise noted, passing a null argument to a constructor or method in this class will cause a NullPointerException to be thrown. As of release JDK 5, this class has been supplemented with an equivalent class designed for use by a single thread, StringBuilder. The StringBuilder class ...
up以Method_EX为演示类,代码如下 : 九、String类,StringBuffer类,StringBuilder类总比较 特性对比: ①String: 不可变字符序列,效率低,但是复用率高。 ②StringBuffer: 可变字符序列,效率较高,且线程安全。 ③StringBuilder: 可变字符序列,效率最高,但线程不安全。
The principal operations on a StringBuilder are the append and insert methods, which are overloaded so as to accept data of any type. Each effectively converts a given datum to a string and then appends or inserts the characters of that string to the string builder. The append method always...