3. Output, input, basic data type

1. Output

Package Com.example;public class MyClass {    public  static void Main (String args[]) {        System.out.println ( Byte.min_value + "~" + byte.max_value);        System.out.println (Integer.parseint (")");        System.out.println (Integer.tobinarystring ());        System.out.println (Integer.tohexstring ());        System.out.println (integer.tostring);}    }

2. Enter

Package Com.example;import Java.util.scanner;public class MyClass {public    static void Main (string[] args) {        // Scanner input data from the console        Scanner Scanner = new Scanner (system.in);        System.out.println ("Name:");        String name = Scanner.next ();        System.out.println ("Gender:");        char sex = Scanner.next (). charAt (0);        System.out.println ("Age:");        int age = Scanner.nextint ();        System.out.println ("height");        Double height = scanner.nextdouble ();        System.out.print ("character");        String type = Scanner.next ();        SYSTEM.OUT.PRINTLN ("Hi everyone, I am:" +name+ ", Gender:" +sex+ ", Age:" +age+ ", Height:" +height+ ", Character:" +type "); rain, female, 22, 1.62, haha           }}

3. Basic data types and their conversions

Package Com.example;public class MyClass {    public  static  void  main (string[] args) {        //1.        Long longvalue = 3000000000l;        2.        Auto-turn: Byte->short->int->long        //strong turn: Long->ing->short->byte        //3.        BYTE B1 = 5;        Because an integer is stored internally as int        //So byte B3 = B1 + 3 is wrong and can be changed to the following two forms:        byte b2 = (byte) (B1 + 3);        int B3 = B1 + 3;        1.        float c = 4.3f;        2.        Auto-turn: float->double        //strong turn: Double->float        //char Type: characters, Kanji, English letters, by ' wide up        //bool type: True and False    }}

3. Output, input, basic data type