public class Demo02 {
    public static void main(String[] args) {
        //八大基本数据类型
        int num1 = 10;
        byte num2 = 20;
        short num3 = 30;
        long num4 = 30L;//Long类型要在数字后面加个L

        //小数: 浮点型
        float num5 = 50.1F;//float类型要在数字后面加个F
        double num6 = 3.1415926;

        //字符
        char name = 'A';
        //字符串,String不是关键子，类
        String namea = "lixiaohang";

        //布尔值;是非
        boolean flag = true;
        //boolean flag = false;
    }
}