java字符、字符串、数值、ASCII码的转换

		char char1 = '9';
		String str1 = String.valueOf(char1);
		System.out.println(Integer.valueOf(str1)+3);

		char char2 = '9';
		String str2 = String.valueOf(char2);
		System.out.println(str2+"哈哈哈");

		String str3 = "abs";
		char[] char3 = str3.toCharArray();
		System.out.println(char3);

		String str4 = "123";
		int num4 = Integer.valueOf(str4);
		System.out.println(num4+2);

		int num5 = 123;
		String str5=String.valueOf(num5);
		char[] char5 = str5.toCharArray();
		System.out.println(char5);

		int num6 = 456;
		String str6 = String.valueOf(num6);
		System.out.println("456转为字符串是:"+str6);

		char char7 ='a';
		int num7 =Integer.valueOf(char7);
		System.out.println(num7);

		int num8 = 97;
		char char8 = (char) num8;
		System.out.println(char8);