字符串和ASCII之間的轉換

public class CharToAscii {

	public static void main(String[] args) {
		CharToAscii.AscToString();
		CharToAscii.StringToAsc();
		char a = '0';
		int b = 22307;
		//char類型參與四則運算的時候是轉化成asciii碼的, 字符‘0’的ascii碼為48，要轉換成int型，只需要（‘0’-48）即可
		System.out.println(a-48); 
		System.out.println((int)a); //將char型強行轉制為int型得到的是Ascii碼
		System.out.println((char)b);//將int型強行轉制為char型得到的是字符
	}

	public static void AscToString() {  //ASCII轉換為字符串
		String s = "22307 35806 24555 20048";
		String[]  chars = s.split(" ");
		for (int i = 0; i < chars.length; i++){
			System.out.println(chars[i] + " " + (char)Integer.parseInt(chars[i]));
		}
	}

	public static void StringToAsc() { //字符串轉換為ASCII碼
		String s = "新年快樂！";
		char[] chars = s.toCharArray();
		for (int i = 0; i < chars.length; i++){
			System.out.println(" " + chars[i] + " " + (int)chars[i] );
		}
	}

}