java string reverse java string reverse函数 1.利用StringBuffer里的reverse()方法 虽然String和StringBUffer都能操作字符串,但是不属于同一个类,不能直接兼容 StringBuffer()将String类型的str转换为StringBuffer,方便调用reverse()方法。 toString()将StringBuffer类型转换为String类型 2.最快的方式StringBuilder StringB...
1、int indexOf(String str) :返回第一次出现的指定子字符串在此字符串中的索引。 2、int indexOf(String str, int startIndex):从指定的索引处开始,返回第一次出现的指定子字符串在此字符串中的索引。 3、int lastIndexOf(String str) :返回在此字符串中最右边出现的指定子字符串的索引。 4、int lastIn...
1. Java Program to Reverse the Characters of a String We canreverse a string by charactereasily, using aStringBuilder.reverse()method. StringblogName="HowToDoInJava.com";Stringreverse=newStringBuilder(string).reverse();System.out.println("Original String -> "+blogName);System.out.println("Rever...
* How to Reverse a string in Java? * Version: 2.0 */ publicclassCrunchifyReverseString{ publicstaticvoidmain(String[]args){ StringtestString ="Crunchify.com Example"; System.out.println("String: "+ testString); System.out.println("\nSolution1: Reverse Using reverseStringBuffer: "+reverseSt...
StringBuilder类的常用方法功能描述StringBuilder append(String str)追加字符串StringBuilder insert(int dstOffset,String s)插入字符串StringBuilder delete(int start,int end)删除字符串StringBuilder replace(int start,int end,String str)替换字符串StringBuilder reverse()字符串反转 ...
importjava.util.Scanner; /* * Scanner:用于获取键盘录入数据 * public String nextline():获取键盘录入字符串数据 */ publicclassScannerLearn{ publicstaticvoidmain(String[] args){ Scannersc=newScanner(System.in); System.out.println("请输入数据:"); ...
1importjava.util.Scanner;23//键盘录入一串字符,将字符中大写转化成小写,将小写转化为大写,数字以*来代替4publicclasstest04 {5publicstaticvoidmain(String[] args) {6//实例化Scanner7Scanner input =newScanner(System.in);8System.out.println("请输入一串字符");910String s =input.next();11//将字符串...
public StringBuffer reverse() Causes this character sequence to be replaced by the reverse of the sequence. If there are any surrogate pairs included in the sequence, these are treated as single characters for the reverse operation. Thus, the order of the high-low surrogates is never reversed....
示例代码：// StringBuffer reverse StringBuffer stringBuffer = new StringBuffer(); stringBuffer. ...
sb1.reverse(); // 字符串逆转 str = sb1.toString(); // 将StringBuffer以String的方式返回 System.out.println(str); } 从上述例子可以看出:String和StringBuilder最大的区别在于String的内容无法修改,而StringBuilder的内容可 以修改。频繁修改字符串的情况考虑使用StringBuilder ...