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what is java mobile

Java mobile phones are mainly Linux-based mobile phones that use Linux+Java to run applications. Mobile phone software is developed in the Java language and is called a Java feature phone. The applications it runs are all executable files ending in *.jar.

Nov 13, 2019 am 10:45 AM

java cell phone

what is java exception

Java exceptions are a consistent mechanism provided by Java to identify and respond to errors. This exception mechanism can separate the exception handling code and normal business code in the program, ensuring that the program code is more elegant and improving the robustness of the program.

Nov 13, 2019 am 10:23 AM

java abnormal concept

How to parse XML in java

There are four ways to use javaXML: DOM way to parse XML, SAX way to parse XML, JDOM way to parse XML, and DOM4j way to parse XML.

Nov 13, 2019 am 10:20 AM

java

How to understand java reflection

Reflection in Java is a mechanism that allows us to obtain internal information of classes such as methods, attributes, parent classes, interfaces, etc. at runtime. In other words, reflection is essentially a "reverse" process.

Nov 13, 2019 am 10:19 AM

java

What is a thread in java? How to understand?

A thread in Java refers to an execution process in a process. A thread always belongs to a certain process. A thread does not have its own virtual address space and shares all resources allocated to the process with other threads in the process.

Nov 13, 2019 am 10:12 AM

java concept understand thread

what is java reference

Java reference is one of the two major data types in Java. It points to an object and we can operate the object through the reference. References are stored in stack memory, objects are stored in heap memory, and references on the stack store the address of the object in the heap.

Nov 13, 2019 am 10:12 AM

java Quote

How to understand the concept of threads in java

Nov 13, 2019 am 10:12 AM

java concept understand thread

How to enter a string in java

Steps to input strings in java: First, import the java.util.* package; then, you need to create a new scanner object (Scanner) that reads standard input (keyboard); now you can input strings from the keyboard, use Scanner.nextLine () method to get the string.

Nov 13, 2019 am 10:10 AM

java

Three ways to traverse arrays in java

There are three ways to traverse an array in Java, namely: 1. Use a for loop to traverse the array; 2. Use the foreach statement to traverse the array; 3. Use the toString static method in the Arrays tool class to traverse the array.

Nov 13, 2019 am 09:56 AM

java array Way Traverse

How to read data from file in java

The method for java to read data from a file is: 1. Create a new Class class; 2. Write the Main method; 3. Create a new txt document in the root directory of the C drive for testing; 4. Create a File object; 5. Create a StringBuilder object; 6. , read the file content.

Nov 13, 2019 am 09:41 AM

java data document read

How to define functions in java

The syntax format of defining a function in Java is: modifier + return value type + function name ([parameter type 1 + parameter name 1], parameter type 2 + parameter name 2...) {execution statement + return + return value}.

Nov 13, 2019 am 09:23 AM

java function definition

The difference between processes and threads in java

The difference between processes and threads in Java is: 1. Threads in the same process share the address space of this process, while processes have independent address spaces; 2. Threads in the same process share the resources of this process, but between processes The resources are independent.

Nov 12, 2019 pm 05:26 PM

java the difference thread process

How to understand reflection in java

Reflection in Java means that in the running state, for any class, you can know what methods and properties the class has, and for any object, you can call its methods and properties.

Nov 12, 2019 pm 05:07 PM

java reflection understand

What is rewriting in java

The inheritance feature of classes in Java programs can produce a subclass. When the subclass inherits the parent class, it will have the non-private properties of the parent class. In the subclass, you can add your own properties, and you can also extend the methods in the parent class. , to enhance its own functions, which is called rewriting, also called copying or overwriting.

Nov 12, 2019 pm 04:54 PM

java rewrite