The application of Hello.java--java Grammar Foundation

1 /**2 * Description of Class3  * 4  * @authorHasee Author5  *6  */7  Public classHello {8     /**9 * This is the main method, the entrance to the programTen      *  One      * @paramargs input parameter, array of string type A      */ -      Public Static voidMain (string[] args) { -         //Key Code the         //Notes -  -System.out.println ("Hello World"); -  +String _$dd123 = "";//Defining Variables -  +         inti; A  ati = 123; -  -         intm = 1, n = 2, x = 4, y = 5; -  -         Final DoublePAI = 3.14; -  in         //pai = 3.1415926; -  to         //i = "ddd" +  -String strUserName = "Tom lives in this room"; the  * System.out.println (strusername); $ Panax NotoginsengstrUserName = "Zhang San Live Here"; -  the System.out.println (strusername); +  A         byteb =-128; the  +          Shorts = 2; -  $         intj = 123; $  -         intL = (int) 1234L;//cast, show conversion -  the         LongLL =b; - Wuyi         floatf = 123.45F; the  -         DoubleD = 123.45D; Wu  -F = (float) D; About  $         Charc = ' a '; -  -         intA =C; -  ASystem.out.println ("a =" +a); +  the         Charg = 98; -  $System.out.println ("G =" + g);//ASCII code the  the         //UTF-8 the  the         Booleant =true;//1 means true, logic really -  int =false;//0 = False, logical false the  theSystem.out.println ("20% 7 =" + (20% 7)); About  the         intz = 10; the  the         //z++;//z = z + 1 +  -System.out.println ("z =" + z++); the Bayi         //z--;//z = z-1 the  theSystem.out.println ("z =" + z--); -  -System.out.println ("z =" +z); the  the         //System.out.println ("z =" + ++z); the  the         //z--;//z = z-1 -  the         //System.out.println ("z =" +--z); the  the         //System.out.println ("z =" + z);94  thez = 10; the  the         intK = + +Z;98  Aboutz + = 2;//z = z+2; -Z-= 2;//z = z-2;101 102Z *= 2;//z = z;103Z/= 2;//z = Z/2;104Z%= 2;//z = z%2; the 106         BooleanLuoji =true&true;107System.out.println ("true && true =" +Luoji);108 109Luoji =true&&false; theSystem.out.println ("true && false =" +Luoji);111  theLuoji =false&&false;113System.out.println ("false && false =" +Luoji); the  theLuoji = (2 > 1 & 3 < 4); the 117Luoji =true||true;118System.out.println ("true | | true = "+Luoji);119  -Luoji =true||false;121System.out.println ("true | | false = "+Luoji);122 123Luoji =false||false;124System.out.println ("false | | false = "+Luoji); the 126Luoji =! (2 > 1 | | 3 > 4);//The original result is true, the front added! The result is reversed and false .127  -         intv = 2 > 1? 1:2;129  theString str = 4 > 5? "ASD": "";131  theString ss = "";133 134         if(4 > 5) {135SS = "ASD";136         }137 138         intQ = ((2 + 1) * (4-3));139  $SYSTEM.OUT.PRINTLN ("10! = 9 =" + (10 = = 9));141 142String A2 = "";143 144     }145}

The application of Hello.java--java Grammar Foundation