public static void small(String a) {
String aa[] = new String[a.length()];
for (int i = 0; i < a.length(); i++) {
aa[i] = a;
if (!aa[i].toLowerCase().equals(aa[i])) {
aa[i] = aa[i].toUpperCase();
} else {
System.out.println("不转换");
}
}
String s = null;
for (int i = 0; i < a.length(); i++) {
s = aa[i];
}
System.out.println(s);
}
public static void small1(String line) {
char[] arr = line.toCharArray();
for (int i = 0; i < arr.length; i++) {
char temp;
if (arr[i] >= 97 && arr[i] <= 122) {
arr[i] = (char) (arr[i] - 32);
}
}
for (char a : arr) {
System.out.print(a);
}
}
public static char small2(char aChar) {
if (Character.isLowerCase(aChar)) {
return Character.toUpperCase(aChar);
}
return aChar;
}
public static void main(String[] args) {
small("aaBCDef");
small1("aaBCDef");
System.out.println();
Scanner scanner = new Scanner(System.in);
System.out.println("请输入一个字母");
char aChar = scanner.nextLine().charAt(0);
System.out.println(small2(aChar));
}
编写一个方法,判断一个字符是否有小写字母,如果是,将它转换成大写字母,否则,不转换。三种方法
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转载自blog.csdn.net/weixin_45061669/article/details/104783704
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