本文实例汇总了Java实现字符串倒序输出的常用方法,分享给大家供大家参考。具体方法如下:
1. 最容易想到的估计就是利用String类的toCharArray(),再倒序输出数组的方法了。
实现代码如下:
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import
javax.swing.JOptionPane;
public
class
ReverseString {
public
static
void
main (String args[]){
String originalString;
String resultString =
""
;
originalString = JOptionPane.showInputDialog(
"Please input a String: "
);
char
[] charArray = originalString.toCharArray();
for
(
int
i=charArray.length-
1
; i>=
0
; i--){
resultString += charArray[i];
}
JOptionPane.showMessageDialog(
null
, resultString,
"Reverse String"
, JOptionPane.INFORMATION_MESSAGE);
}
}
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2. 还可以利用String类提供的subString()方法,利用递归的办法输出倒序字符串。
实现代码如下:
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import
javax.swing.JOptionPane;
public
class
ReverseString {
public
static
void
reverseString (String str){
if
(str.length() ==
1
){
System.out.print(str);
}
else
{
String subString1 = str.substring(
0
, str.length()-
1
);
String subString2 = str.substring(str.length()-
1
);
System.out.print(subString2);
reverseString (subString1);
}
}
public
static
void
main (String args[]){
String originalString;
originalString = JOptionPane.showInputDialog(
"Please input a String: "
);
reverseString (originalString);
}
}
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3. 还有就是不把字符串定义为String类,而是定义成一个StringBuffer类,用StringBuffer类中的reverse()方法直接倒序字符串。
实现代码如下:
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import
javax.swing.JOptionPane;
public
class
ReverseString {
public
static
void
reverseString (String str){
StringBuffer stringBuffer =
new
StringBuffer (str);
System.out.print(stringBuffer.reverse());
}
public
static
void
main (String args[]){
String originalString;
originalString = JOptionPane.showInputDialog(
"Please input a String: "
);
reverseString (originalString);
}
}
|
希望本文所述对大家Java程序设计的学习有所帮助。