java基本数据类型

package Number;
public  class  Frist {
    static  String s1 = "你好";
    static  final  double PI = 3.14;
//    int m = 123;
    public  static void  main(String[] args) {
        String s2 = "Java";
        System.out.println(s1);
        System.out.println(s2);

        byte mybyte = 124;
        short myshort = 32564;
        int myint = 4578612;
        long mylong = 46789451;
        long result = mybyte + myshort + myint + mylong;
        System.out.println(result);

        float f1 = 3.14f;
        double d1 = 456.12d;
        double d2 = 456.12;
//        float f2 = 3.14;必须有f结尾

        char word = 'd', word2 = '@';
        int p = 23045, p2 = 45213;
        System.out.println((int)word);
        System.out.println((int)word2);
        System.out.println((char)p);
        System.out.println((char)p2);

        boolean b;
        boolean b1, b2;
        boolean b3 = true;
        System.out.println(b3);

        int $a = 1;
        int ¥a = 2;
        int 啊 = 3;
        System.out.println($a);
        System.out.println(¥a);
        System.out.println(啊);

        final int number;
//        number = 12345;
        System.out.println(PI);
        System.out.println(number=1234);

//        System.out.println(m);
        int a1 = 4;
        int b11;
        b11 = ++a1;//用之前+1
        System.out.println(a1);
        System.out.println(b11);

        int c1,d11;
        c1 = 4;
        d11 = c1++;//用之后+1
        System.out.println(c1);
        System.out.println(d11);
        System.out.println(c1>d11);

        boolean b224 = 20 > 24 ? true : false;
        System.out.println(b224);



    }
}