basic networking fundamentals

(); - //System.out.println ("Age is:" + i); - - //ot.setobj (New String ("Brigitte")); + // //classcastexception - //Integer II = (integer) ot.getobj (); + //System.out.println ("name is:" + II); A atSystem.out.println ("-------------"); - -objecttoolNewObjecttool(); - //ot.setobj (new Integer);//This is the time to compile . -Ot.setobj (NewString ("Brigitte")); -String s =ot.getobj (); inSystem.out.println ("name is:" +s); - toObjecttoolNewOb

long typeOtherwise it will be converted to int type;Converting a large range of numeric types to a small range of numeric types requires an explicit conversion and may be accompanied by a loss of precision.Examples of interview questions1. (false?) 10.9:9) What is the value?Java is automatically type-converted based on the precision type of the operator, and 9 is automatically converted to 9.0 due to the presence of 10.9. So the result is 9.0.2. Char x= "9"; (false?) X:10) The value of why?When

, please enter the correct number of items, press ENTER to continue"); Console.ReadLine (); } Else{Console.Write ("Please enter the new data:"); intNewnum =int. Parse (Console.ReadLine ()); Nums[n-1] =Newnum; } } } Else if(Input = =4) { for(inti =1; I 1; i++) { for(intj = i +1; J )

/dir=================================================================================[[emailprotected] ~]#stattest11.gzfile: ' test11.gz ' Size:122 Blocks:8 ioblock:4096regularfiledevice:802h/2050d Inode:12133Links: 1access: (0644/-rw-r--r--) Uid: (0/root) Gid: (0/root) access:2015-03-10 14:50:52.616930866+0800Modify:2015-03-0505:30:10.555977000+0800Change: 2015-03-1014:50:44.910931488+0800================================================================= ================PS: Changing CTime does n

(enemy1.name); Print (ENEMY1.HP); Enemy1.name = "Mary"; Print (enemy1.name); Enemy enemy2 = new Enemy (); Enemy2.name = "small Two"; Print (Enemy1.name + "-" + enemy2.name); Enemy1. Move (); Enemy2. Move (); }} The field of class Enemy {public string name;//public can access public int hp through the object ; public void Move () { Debug.Log (name + "Moving"); } public void Attack () { Debug.Log ("attacking")

"Lan Unity Development Fundamentals Three" Lesson 2 game objects and basic operationsfirst, let's take a look at the picture below --pyramid architectureRecommended Video Lecturer Blog: http://11165165.blog.51cto.com/A game is made up of multiple scenes,The scene is made up of multiple game objects,Each game object is made up of multiple components,Each component is designed to accomplish a specific functio

the elements inside letnamearrayd= ["Zhang San", "John Doe", "Harry"]//namearrayd[0]= "Replace" fornameinnamearrayd{ println ("name=\ (name)")}// takes both the elements inside the array and the subscript where the element is located, using enumerate ( Array name) method for (Index,name) inenumerate (Namearrayd) { println ("index=\ (Index), name=\ (name)")}// dictionary, in Swift, all keys in the dictionary are of the same type, All value is the same type, and key and value can be of different

} - - //character Array theString []d =NewString [] {"You", "is", "my", "small", "Apple"}; the the for(inti = 0; I ) the { - System.out.println (D[i]); the } the } the 94 Public Static voidMain (string[] args) the { the //first, basic variables the basicvariables ();98 About //Second, array - aboutarrays ();101 }102 103 10

expressed, because the lower effective bit of the shed is 0, naturally does not matter if the floating-point type of the above example uses a double, the precision is not lost because the double has a precision of 52 bits.3) solve the problem of floating-point precision loss?? Floating-point type brings the problem of loss of precision is very painful, so in general, in the program is not used in the float, double to store the larger data. And business computing often requires accurate results.

Linux Fundamentals-Basic concepts and simple commandsBefore learning Linux, in order to better understand Linux and master Linux individuals think should have the condition:1. Computer introduction and hardware related knowledge.2. Establishment of the Network Foundation.3. Learn from Linux basics, such as the installation of Linux and the use of commandsBasic skills of the 4.linux operating system.Here are

1. Start of the "#" comment#注释的东西print ("Welcome")2. "\ n" line break3. "\" then the previous line2>3 or 3==3Note: The logical operator must be in front of \ or error4. Using tuples to assign values to multiple variables5. ":" Separate the statements, our usual if,while,for are used to6. ";" To connect multiple statements together, but to avoid doing so for readabilityImport Sys;sys.platformRight here, thank you.------------------------------------------------------------------Click to jump

. FilterWriterFeatures: abstract class, used to write Filtered character streamPipedWriterFeatures: Writing a stream of characters to a pipePrintWriterCharacteristics: PrintWriterUsed to format the object and output it to the character stream PrintWriterContains many types of write-out methods, but does not include the original byte type Unlike PrintStream , flush occurs even if automatic flushing is turned on, method println , printf or format method call . StringWrit

so-called network configuration (setting) is to modify the network configuration file card corresponding, you can use the text editor (vi) directly edit the network configuration file to reconfigure the network.4. After-school assignments (spents 35 minutes)1) View details of all currently started NICs2) Activate the first NIC of the system3) temporarily set IP to 192.168.1.10/24 for the system4) View the details of the first NIC5) Modify the network adapter profile to set the IP address of the

650) this.width=650; "Src=" Https://s4.51cto.com/oss/201711/20/bce68f1d0f3c509e455262c9d81dadba.png-wh_500x0-wm_3 -wmp_4-s_3244096110.png "title=" 1.png "alt=" Bce68f1d0f3c509e455262c9d81dadba.png-wh_ "/>650) this.width=650; "Src=" Https://s3.51cto.com/oss/201711/20/f7894a3bfe1f27f4a279026f8d2b9a01.png-wh_500x0-wm_3 -wmp_4-s_1986929794.png "title=" 2.png "alt=" F7894a3bfe1f27f4a279026f8d2b9a01.png-wh_ "/>650) this.width=650; "Src=" Https://s4.51cto.com/oss/201711/20/61a5fb6e9b07eb1c9efaa89f0588c

exception, resulting in overwriting the data, so there is: Java implemented a true array, to avoid the data overwrite)4. Modifier permission Range (4 3 2 1 decrement)This kind of package (including sub-category) different Bun class outsidePublic 1 1 1 1Protected 1 1 1 0Default 1 1 0 0Private 1 0 0 01 of which are accessible, 0 are not accessible5,i++ and ++i Java uses the intermediate cache variable mechanism:i=i++ the same as:temp=i (I on the right side of the equals sign)i=i+1; (I on the righ

[] args) {9 //CreateTenarraylistString> array =NewarraylistString>(); One A //adding elements -Array.add ("Hello"); -Array.add ("World"); theArray.add ("Java"); - //Array.add (new Integer); - //Array.add (ten);//Auto-boxing after JDK5 - //equivalent to: Array.add (integer.valueof (Ten)); + - //Traverse +iteratorString> it =array.iterator (); A while(It.hasnext ()) { at //classcastexception - //string s = (string)

; atInteger I6 = 128; -SYSTEM.OUT.PRINTLN (i5 = =I6); - System.out.println (I5.equals (I6)); -System.out.println ("-----------"); - -Integer i7 = 127; inInteger i8 = 127; -System.out.println (i7 = =i8); to System.out.println (I7.equals (i8)); + - //by looking at the source code, we know that for data between 128 and 127, a data buffer pool is made, and if the data is within that range, no new space is created each time the //Integer II = integer.valueof (127); * } $}The res

1. Overview of the Integer class(1) The integer class wraps a value of a primitive type int in the object, and an object of type integer contains a field of type int.(2) This class provides several methods for converting between int and string types, as well as some other constants and methods that are useful when dealing with int types.2. How integer is constructed(1) public Integer (int value);(2) Public Integer (String s);3. Case of the Integer class1 Packagecn.itcast_02;2 3 /*4 * Method of

called attributesThe GetName, eat and work three methods are also defined in the above class4. What is a property? How do I define a property?The data element used to describe an object is called an object's property, and the data contained in the definition of the class is called a property.Global Properties : [permission modifier] [static] Data Type property name [= value]; ---->publicstatic String name = "Sala";Static modifier, this can be used firstLocal Properties : Data Type property n

statementChar grade = ' B ';Switch (grade){Case ' A ':System.out.println ("excellent!");BreakCase ' B ':Case ' C ':System.out.println ("Well-done");BreakCase ' D ':SYSTEM.OUT.PRINTLN ("You passed");Case ' F ':System.out.println ("Better try Again");BreakDefault:System.out.println ("Invalid grade");}System.out.println ("Your grade is" + grade); } //Method Learning public static void Method () { int a=1; int b=2; int Maxvalue=max (A, b); system.out.println (maxValue); /** Re