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);
}
}
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希望本文所述对大家Java程序设计的学习有所帮助。