java编写统计字符串中的字母.数字和其他字符的个数

//看看吧。。。
import java.util.Vector;

import javax.swing.JOptionPane;

public class Test {
public static void main(String[] args) {
Vector v = new Vector();
boolean fo = true;
String string = JOptionPane.showInputDialog("输出参数");
for (int i = 0; i < string.length(); i++) {
if (v.size() == 0) {
javaBean jb = new javaBean();
jb.setCa(string.charAt(i));
jb.setA(1);
v.add(jb);
fo = false;
} else {
for (int count = 0; count < v.size(); count++) {
javaBean jb = (javaBean) v.get(count);
if (string.charAt(i) == jb.getCa()) {
jb.setA(jb.getA() + 1);
v.set(count, jb);
fo = false;
break;
}
}
}
if (fo) {
javaBean jb = new javaBean();
jb.setCa(string.charAt(i));
jb.setA(1);
v.add(jb);
}
fo = true;
}