switch statement java

The Switch-case statement in Process Control has always been a weakness of mine. Whenever the exam or interview written test, always confused, I think this should be my foundation is too poor reason! In order to completely solve this problem, we have to spend a little effort! First of all, explain the problem from the principle: switch (expression) {Case con

One, the package statement:1, storage directory for class with package name If a class has a package name, it cannot be stored arbitrarily, or the virtual machine cannot load such a class. Program If the package name is used: Package Tom.kepler; (packet name is the path to the Java file). Then the directory where the files are stored is: ... \tom\kepler; and compiled bytecode files are also in this dire

Learn to program the Java Learning switch selection structure released, welcome to visit through Xuebiancheng8.comThe previous analysis of Java's Process control is divided into the choice structure, the loop structure, wherein the choice structure can be divided into the if choice structure and the switch structure. Let's analyze the

In Ubuntu, if you have more than one Java version installed (sometimes some software installs itself), how can you easily switch? In addition to the common settings environment variables, today learned a new way to switch:Update-alternatives--config JavaUpdate-alternatives--config JavacAlso, how to install your own Java version:sudo update-alternatives--install/u

A cyclic statement is introduced in Java programming. There are three common forms of circular statements:For statement, while statement, Do/while statement. The following will be described in detail on a case by case basis. The basic structure of a For

Type of support:In jdk1.6, the supported types are only byte,short,char,int. Never mind that there is no long.However, after jdk1.7, you can support string types.Char type:Char chara= ' a '; switch (charA) {case ' a ': System.out.println ("output a"); Break;case ' B ': System.out.println ("Output B"); break; Case ' C ': System.out.println ("Output C"); BREAK;DEFAULT:SYSTEM.OUT.PRINTLN ("Error! "); break;}String type:String str= "ABC";

1. This cannot be done throughWe know that Java and C can do this when using switch.Switch (i){Break is not used here in JavaExecutes case 1: The corresponding statement is followed directly through the statement in case 2:.Case 1:Console.WriteLine ("111");Case 2:Console.WriteLine ("222");BreakDefaultConsole.WriteLine ("333");Break}But this in C # will cause an e

1. This cannot be done throughWe know that Java and C can do this when using switch.Switch (i){Break is not used here in JavaExecutes case 1: The corresponding statement is followed directly through the statement in case 2:.Case 1:Console.WriteLine ("111");Case 2:Console.WriteLine ("222");BreakDefaultConsole.WriteLine ("333");Break}But this in C # will cause an e

Enhanced for LoopJAVA5 introduces an enhanced for loop that is primarily used for arrays.Example Public classFortest { Public Static voidMain (String args[]) {int[] numbers = {1, 3, 5, 7, 2, 4, 6, 8}; for(intx:numbers) {System.out.print (x); System.out.print (","); } System.out.println (); String [] Names= {"Jihite", "David", "Tom"}; for(String name:names) {System.out.print (name); System.out.print (‘,‘); } }}Results1,3,5,7,2,4,6,8, Jihite,david,tom,SwitchNote : The variab

The computer must be installed to switch versions of the JDK, you can not use the green package instead.Copy the following to the newly created text file, the suffix is modified to the bat format, and right-click Run as Administrator@echo Offrem Switch Java JDK version echo please switch to admin to toggle Echo Current

Use update-alternatives to switch the default java commands in ubuntuSky @ sky-VGN-CR23-B :~ $ Cd/usr/java/jdk1.7.0 _ 21/Sky @ sky-VGN-CR23-B:/usr/java/jdk1.7.0 _ 21 $ cd ..Sky @ sky-VGN-CR23-B:/usr/java $ sudo ln-s./jdk1.7.0 _ 21./jdk1.7Sky @ sky-VGN-CR23-B:/usr/

This article for want to switch to learn Java friends to make some study suggestions, and give the Java learning Route, hope to help people less detours.There are a few conditions that you must have for a career change or a self-taught Java:01 Learning AbilityWhat is learning ability, is when a strange thing to you, wh

scheduler, continue to the next task 4. User code suspends the current task, yielding 5 of CPU time. Hardware interrupts. Some time ago it was found that someone was using Futex's wait and wake to test the direct consumption (link) of the context switch, and someone used blocking IO to test the context Switch's consumption (link). So how does the Java program Test and observe the consumption of contextual

-1.b15.el7_2.x86_64/jrejre_1.8.0 auto/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.111-1.b15.el7_ 2.x86_64/jrejre_1.8.0_openjdkauto/usr/lib/ Jvm/jre-1.8.0-openjdk-1.8.0.111-1.b15.el7_2.x86_64xinputrcauto /etc/x11/xinit/xinput.d/ibUs.conflibjavaplugin.so.x86_64auto/usr/lib64/icedteaplugin.socifs-idmap-plugin auto/usr/lib64/cifs-utils/cifs_idmap_ sss.somtaauto/usr/sbin/sendmail.postfixcdrecord auto/usr/bin/wodimlibwbclient.so.0.12-64 auto/usr/lib64/samba/wbclie

. Its execution process is like this. First, execute the -- n statement, decrease the Variable n, and then return the new value of n. This value is then compared with 0. If it is greater than 0, the loop continues. Otherwise, it ends. The do-while loop is especially useful when selecting menus, Because you usually want to execute the menu loop body at least once. The following program is a simple help system that implements

The switch statement consists of a control expression and a case label, unlike the IF statement, the data type of the control expression after the switch statement can only be an integer type, not a Boolean type, followed by a code block immediately after the case tag. Case

Switch... standard syntax of case 1 switch (variable to be selected) 2 {3 case value 1: Statement 1; 4 break; 5 case value 2: Statement 2; 6 break; 7 ....... 8 case value n: Statement n; 9 break; 10 default: Statement n + 1; 11 b

The data type after the switch expression can only be byte,short,char,int four types, enum type and java.lang.String type (only allowed from Java 7), and cannot be a Boolean type.See a lot of articles on the internet, said switch also support Byte,short,char,int packaging class, first of all can certainly say that switch