java--day2

public class Main {
    public static void main (String[] args) {
        System.out.println("Practice makes perfect!");
    }
}

输出语句的使用

public class Main {
    public static void main(String[] args) {
        System.out.println("v   v\n v v \n  v  ");
    }
}

 转义字符的使用'\n'

public class Main {
    public static void main(String[] args) {
        System.out.println("The size of short is 2 bytes.\nThe size of int is 4 bytes.\nThe size of long is 8 bytes.\nThe size of long long is 8 bytes.");
    }
}

short-2字节

int-4字节

long-8字节

long long-8字节

public class Main {
    public static void main(String[] args) {
        System.out.println("printf(\"Hello, world!\\n\");");
    }
}

转义语句的使用，用 \ 对 \ 和 " 进行转义