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without class non of the folder can run so the java program should start in class we can use the class without object in java
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∙ 13y ago
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Where java program started?
If it is already compiled, you can start your Java program from the command line. Just type java myclass replacing "myclass" with the program you want to start - a program with the ".class" extension, for example, myclass.class.
Which one is the compulsory section in a java program?
Class declaration
Is class is mandatory in program?
In C, no. In Java, yes.
What do you get when you compile a java program?
The java interpreter or JVM (Java Virtual Machine) is not able to execute the java source code for a program. The java source code first needs to be compiled into bytecode that can be processed by JVM. Producing bytecode make the program platform independent as each platform has its own JVM. It is also possible to directly write bytecode, bypassing the need to compile, but that would be tedious job and also not good for security purpose as the compiler checks for various errors in a program.
What is the command to compile a java program named Greetingsjava?
The command to compile a Java program is "javac", followed by the class name (file name).
Where java program started?
If it is already compiled, you can start your Java program from the command line. Just type java myclass replacing "myclass" with the program you want to start - a program with the ".class" extension, for example, myclass.class.
What will happen if a Java Class has no Main Method?
Nothing will happen. There is no restriction that every Java class must have a main method. The only program is that, this class cannot be executed as a standalone java program.
Which one is the compulsory section in a java program?
Class declaration
How do you execute a Java program?
You can run a Java application from the command line using "java <name of the class>"
Is class is mandatory in program?
In C, no. In Java, yes.
In java a class will take memory?
Yes, executing a Java class will require memory just like any other program.
What do you get when you compile a java program?
The java interpreter or JVM (Java Virtual Machine) is not able to execute the java source code for a program. The java source code first needs to be compiled into bytecode that can be processed by JVM. Producing bytecode make the program platform independent as each platform has its own JVM. It is also possible to directly write bytecode, bypassing the need to compile, but that would be tedious job and also not good for security purpose as the compiler checks for various errors in a program.
Why you same name in class and file in java?
For run the program
What is the command to compile a java program named Greetingsjava?
The command to compile a Java program is "javac", followed by the class name (file name).
How do you run a java program form the command prompt?
The command is "java", followed by the class name. For example, if your compiled class is called myclass.class, you give the command: java myclass
Why is a keyword class used before a java program?
Because you are creating a class - a class in the sense of OOP.
Explain the structure of a java program?
The fundamental structure of any Java programme should look like: [package declarations] [import statements] [class declaration] An example is given below: package abc; import java.lang; class Demo { public static void main(String[] args) { Sytem.out.println("Hello! World"); } } //The file containing this class must be named Demo.java
