java：大小写字母转换

public class Solution {

	public static void main(String args[]) {
		testSolutions.lowercaseToUppercase('A');
		testSolutions.UppercaseTolowercase('a');

	}

}

class Solutions {
	/**
	 * @param character: a character
	 * @return: a character
	 */
	public char lowercaseToUppercase(char character) {
		// 转大写
		String UppercaseCharacter = String.valueOf(character).toUpperCase();
		System.out.println(UppercaseCharacter.charAt(0));
		return UppercaseCharacter.charAt(0);
	}

	public char UppercaseTolowercase(char character) {
		// 转小写
		String lowercaseCharacter = String.valueOf(character).toLowerCase();
		System.out.println(lowercaseCharacter.charAt(0));
		return lowercaseCharacter.charAt(0);
	}
}