Java字符串反转

时间:2022-02-26 11:07:33

最常用的方式是,反向取出每个字符,然后打印:

public class StringReverse {  
public static void main(String[] args) {
// 原始字符串
String s = "A quick brown fox jumps over the lazy dog.";
System.out.println("原始的字符串:" + s);

System.out.print("反转后字符串:");
for (int i = s.length(); i > 0; i--) {
System.out.print(s.charAt(i - 1));
}

System.out.println();

// 也可以转换成数组后再反转,不过有点多此一举
char[] data = s.toCharArray();
System.out.print("反转后字符串:");
for (int i = data.length; i > 0; i--) {
System.out.print(data[i - 1]);
}
}
}

当然也可用现有的方法:

public class StringReverse {  
public static void main(String[] args) {
// 原始字符串
String s = "A quick brown fox jumps over the lazy dog.";
System.out.println("原始的字符串:" + s);

System.out.print("反转后字符串:");
StringBuffer buff = new StringBuffer(s);
// java.lang.StringBuffer类的reverse()方法可以将字符串反转
System.out.println(buff.reverse().toString());
}
}