ASC和字符转化，整形和String转化

public class ASCTest {
	public static void main(String[] args) {
		/* 区别这两种
		String s = "123";
		int a1 = Integer.parseInt(s);
		a1 = Integer.valueOf(s);
		String s2 = Integer.toString(a1);
		s2 = String.valueOf(a1);
		*/
		
		char a = 'A';
		int b = charToASC(String.valueOf(a));//将字符转化成String
		System.out.println(a+"转化成asc码为："+b);
		
		int c = 123;
		char d = ASCToChar(c);
		System.out.println(c+"转化成字符为："+d);
	}
	
	public static int charToASC(String str)
	{	
		byte[] bytes = str.getBytes();
		return bytes[0];
	}
	
	
	public static char ASCToChar(int asc)
	{
		char a = (char)asc;
		return a;
	}
	
	
}