char字符与int整数之间通过的转换ascii码

public class TestCharToInt {

	/**
	 * @param args
	 * 把char字符型数字转成int数字，因为他们的ascii码值恰好相差48，
	 * 因此把char型数字减去48得到int型数据，例如'4'转换成了4
	 * '0'的ascii码是48
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		char code;
		code = (char)('0' + 1554 % 10);
		System.out.println('4'-48);
		System.out.println(code);
		System.out.println((int)code);
		code = 4;
		System.out.println(0+Character.valueOf(code));
		
		
		System.out.println((char)(0));
		//强制转换，（取到低16位）4个字节的取低2个字节
		char char1=(char)4;
		System.out.println((char)('0'+char1));
		
		
		
		System.out.println(0+Character.valueOf((char)0));
	}

}