day04
强：safe性高、编译速度慢一点
：safe性相对不高、但很流行
变量要符合规定！！！
public class dome {
public static void main(String[] args) {
char a ='我';
char b ='是';
char c ='罗';
char d ='焕';
char e ='钊';
int r = 10;
int r2 = 010;
int r3 = 0x10;
System.out.println(a);
System.out.println(b);
System.out.println(c);
System.out.println(d);
System.out.println(e);
System.out.println((int)a);
System.out.println((int)b);
System.out.println((int)c);
System.out.println((int)d);
System.out.println((int)e);
System.out.println("-------------------------------------------------------------------------------");
float num1 =365.1f;
double num2 =365.1;
System.out.println(num1);
System.out.println(num2);
System.out.println("-------------------------------------------------------------------------------");
System.out.println(num1==num2);
float a3 = 365.2f;
float a4 = a3 + 1;
System.out.println(a3==a4);
}
}
public class dome2 {
public static void main(String[] args) {
System.out.println("hello\tworld");
System.out.println("hello\nworld");
System.out.println("hello,world");
boolean flag = true;
if (flag){
System.out.println("我是罗焕钊");
}
}
}
