public class demo02 {
public static void main(String[] args) {
//八大基本数据类型
//整数
int num1 = 10;
byte num2 = 20;
short num3 = 30;
long num4 = 40L;

    //小数：浮点数
    float num5 = 10.3F;
    double num6 = 3.14159;

    //字符
    char name1 = '中';

    //字符串
    String name2 = "中国";

    //布尔值
    boolean flag = true;

    //整数拓展
    int i = 10;
    int i2 = 010;
    int i3 = 0x10;

    System.out.println(i);//10
    System.out.println(i2);//8
    System.out.println(i3);//16

    //浮点数拓展
    //最好完全避免用浮点数进行比较
    float f = 0.1f;
    double d = 1.0/10;
    System.out.println(f==d);//false

    float d1 = 21313132131f;
    float d2 = d1+1;
    System.out.println(d1==d2);//true

    //字符拓展
    char c1 = 'A';
    char c2 = '中';
    System.out.println(c1);//A
    System.out.println(c2);//中
    System.out.println((int)c1);//65
    System.out.println((int)c2);//20013

    //转义字符
    //\t制表符
    //\n换行

    //布尔值拓展
    boolean flag1 = true;
    if (flag1==true){}//新手
    if (flag1){}//老手




}

}