62,614
社区成员
发帖
与我相关
我的任务
分享
public class Charconvert {
public static void main(String[] args) {
String s = new String("I love China!");
int i;
System.out.println(s.length());
char ch[] = new char[s.length()];
s.getChars(0, s.length(), ch, 0);
for (i = 0; i < s.length(); i++) {
if (Character.isLowerCase(ch[i])) {
System.out.print(Character.toUpperCase(ch[i]));
} else if (Character.isUpperCase(ch[i]))
System.out.print(Character.toLowerCase(ch[i]));
else if(ch[i]=='!')
System.out.print("!");
else
System.out.print(" ");
}
System.out.println();
System.out.println(String.valueOf(ch));
}
}
public static void main(String[]args){
String test= "abc DEFg";
char [] chars = test.toCharArray();
for(int j=0;j<chars.length;j++){
if(chars[j]>='A'&&chars[j]<='Z')
chars[j] = (char)(chars[j]+32);
else if (chars[j]>='a'&&chars[j]<='z')
chars[j] = (char)(chars[j]-32);
}
System.out.println(chars);
}