insert():将字符串插入到指定的位置2.删 delete():删除指定的字符串3.改 replace():替换字符串4.反转 reverse():反转字符串 (3)String,StringBuffer和StringBuilder的区别 String:字符串常量,字符串长度不可变。在java底层中,String是char数组构成的,并且被声明为final类型。 StringBuffer:字符串变量(Synchronized,...
方法1: delete(int start,int end) 删除缓冲区的数据. 返回类型:StringBuffer 方法: delete(int start,int end) 将数据从start开始到end的位置删除 包含头不包含尾部,即包含start的位置,不包含end的位置. 方法2: deletecharAt(index) 删除指定index位置的字符 替换: 方法1: replace(位置1,位置2,(String类型的)...
delete方法 publicStringBufferdelete(intstart,intend) 1. Removes the characters in a substring of this sequence. The substring begins at the specified start and extends to the character at index end - 1 or to the end of the sequence if no such character exists. If start is equal to end, ...
publicclassRunoobTest{publicstaticvoidmain(String args[]){StringBuilder sb=newStringBuilder(10);sb.append("Runoob..");System.out.println(sb);sb.append("!");System.out.println(sb);sb.insert(8,"Java");System.out.println(sb);sb.delete(5,8);System.out.println(sb);} StringBuffer示例: 代码...
privatestaticbooleanisChinese(charc){Character.UnicodeScriptscript=Character.UnicodeScript.of(c);returnscript==Character.UnicodeScript.HAN;} 1. 2. 3. 4. 3. 使用Java的正则表达式和StringBuilder类的结合 以上两种方法分别使用了正则表达式和StringBuilder类来去掉中文字符。我们也可以结合使用它们来实现同样的功能。
一、Java Character类 1、Character类用于操纵单个字符。Character类将基本类型char的值包装到对象中 示例：然而，在实际的开发过程中，我们经常会遇到使用对象而不是内置数据类型的需要。为了解决这个问题，Java语言为内置数据类型char提供了包装类Character类。Character类提供了一系列操作字符的方法。可以使用Character的构造...
StringDemo.java 文件代码: 代码语言:txt AI代码解释 public class StringDemo{ public static void main(String args[]){ char[] helloArray = { 'r', 'u', 'n', 'o', 'o', 'b'}; String helloString = new String(helloArray); System.out.println( helloString ); } } ...
JDK 7offers multiple methods and classes that we can use to remove a character from a string. Let’s take a close look at each option. Usingsubstring()Method Typically,substring()provides the easiest and fastest way to delete the last char in Java. ...
Java.Lang Assembly: Mono.Android.dll Added in 1. [Android.Runtime.Register("delete", "(II)Ljava/lang/StringBuffer;", "")] public Java.Lang.StringBuffer Delete(int start, int end); Parameters start Int32 the offset of the first character. ...
Java.Lang Assembly: Mono.Android.dll Added in 1. C# [Android.Runtime.Register("delete","(II)Ljava/lang/StringBuffer;","")]publicJava.Lang.StringBufferDelete(intstart,intend); Parameters start Int32 the offset of the first character. ...