摘要：
public class DataDemo05{ public static void main(String[] args){ char ch1='\"'; char ch2='\\'; System.out.println("ch1="+ch1); System.out.println("ch2 阅读全文
摘要：
public class DataDemo04{ public static void main(String[] args){ char ch1='a'; char ch2=97; System.out.println("ch1="+ch1); System.out.println("ch2="+ 阅读全文
摘要：
class DataDemo01{ public static void main(String[] args){ int num=99999999999999999999999; }} 阅读全文