java 反转字符串的简单方法
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/12305666/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Easy way to reverse String
提问by assylias
Without going through the char sequence is there any way to reverse Stringin Java
不经过字符序列有没有办法String在Java中反转
回答by mssb
Try this,
试试这个，
String s = "responses";
StringBuilder builder = new StringBuilder(s);
System.out.println(builder.reverse());
回答by assylias
You can use the StringBuilder#reverse()method:
您可以使用以下StringBuilder#reverse()方法：
String reverse = new StringBuilder(originalString).reverse().toString();
回答by Kumar Vivek Mitra
Use StringBuilder'sor StringBuffer'smethod... reverse()
用途StringBuilder's或StringBuffer's方法...reverse()
public class StringReverse
{
public static void main(String[] args)
{
String string=args[0];
String reverse = new StringBuffer(string).reverse().toString();
System.out.println("\nString before reverse: "+string);
System.out.println("String after reverse: "+reverse);
}
}
StringBufferis thread-safe, where as StringBuilderis Not thread safe..... StringBuilderwas introduced from Java 1.5, as to do those operations faster which doesn't have any Concurrency to worry about....
StringBuffer是线程安全的，因为那里StringBuilder是不是线程安全的.....StringBuilder从Java 1.5中引入的，因为做这些操作变得更快，其不具有任何并发到后顾之忧....
回答by lfergon
Try reverse() method:
试试 reverse() 方法：
StringBuilder stringName = new StringBuilder();
String reverse = stringName.reverse().toString();
回答by lfergon
You may use StringBuilder..
您可以使用 StringBuilder ..
String word = "Hello World!";
StringBuilder sb = new StringBuilder(word);
System.out.print(sb.reverse());
回答by nazar_art
If we have to do it:
如果我们必须这样做：
Without going through the char sequence
不经过字符序列
One easy way with iteration will be:
迭代的一种简单方法是：
public String reverse(String post) {
String backward = "";
for(int i = post.length() - 1; i >= 0; i--) {
backward += post.substring(i, i + 1);
}
return backward;
}
回答by dganesh2002
This is a way to do so using recursion -
这是一种使用递归的方法 -
public static String reverse(String s1){
int l = s1.length();
if (l>1)
return(s1.substring(l-1) + reverse(s1.substring(0,l-1)));
else
return(s1.substring(0));
}
回答by NIlesh Sharma
You can use String buffer to reverse a string.
您可以使用字符串缓冲区来反转字符串。
public String reverse(String s) {
return new StringBuffer(s).reverse().toString();
}
one more interesting way to do this is recursion.
一种更有趣的方法是递归。
public String reverse(String s) {
if (s.length() <= 1) {
return s;
}
return reverse(s.substring(1, s.length())) + s.charAt(0);
}
回答by Bob Sheehan
Using minimal API support. A simple algorithm.
使用最少的 API 支持。一个简单的算法。
static String reverse(String str) {
char[] buffer = str.toCharArray();
for (int i = 0; i < buffer.length/2; ++i){
char c = buffer[i];
buffer[i] = buffer[buffer.length-1-i];
buffer[buffer.length-1-i] = c;
}
return new String(buffer);
}
回答by Jayaram Reddy
public class RevString {
public static void main(String[] args) {
String s="jagan";
String rev="";
for (int i=s.length()-1;i>=0;i--) {
rev=rev+s.charAt(i);
}
System.out.println("Reverse String is: "+rev);
}
}
