大写字母变小写字母

是这个意思不 ？？/*****1*****/
也要+东西

public class JModify {
public static void main(String args[]) {
String s1 = "Welcome To Java 2 Examination";
StringBuffer s2 = new StringBuffer();
char ch;
for (int i = 0; i < s1.length(); i++) {
ch = s1.charAt(i);
if (ch >= 'a' && ch <= 'z') {
ch -= 32;
s2.append(ch) ;
continue;
/*****1*****/
}
if (ch >= 'A' && ch <= 'Z') {
ch += 32;
s2.append(ch) ;
/*****2*****/

}
}
System.out.println(s2);
}
}

///*****2*****/中加入

s2.append(ch);