Entry point for Java applications main init or run

Question

So far I ve been using public void run      methods to execute my code in Java  When why might one want to use main   or init   instead of run

User · Answer

The main   method is the entry point for a Java application  run   is typically used for new threads or tasks   Where have you been writing a run   method  what kind of application are you writing  e g  Swing  AWT  console etc  and what s your development environment

User · Answer

This is a peculiar question because it s not supposed to be a matter of choice   When you launch the JVM  you specify a class to run  and it is the main   of this class where your program starts   By init    I assume you mean the JApplet method  When an applet is launched in the browser  the init   method of the specified applet is executed as the first order of business   By run    I assume you mean the method of Runnable  This is the method invoked when a new thread is started    main  program start  init  applet start run  thread start   If Eclipse is running your run   method even though you have no main    then it is doing something peculiar and non-standard  but not infeasible  Perhaps you should post a sample class that you ve been running this way

User · Answer

The main method is the entry point of a Java application   Specifically when the Java Virtual Machine is told to run an application by specifying its class  by using the java application launcher   it will look for the main method with the signature of public static void main String      From Sun s java command page      The java tool launches a Java application  It does this by starting   a Java runtime environment  loading a specified class  and invoking that   class s main method       The method must be declared public and static  it must not return any   value  and it must accept a String array as a parameter  The method   declaration must look like the following   public static void main String args       For additional resources on how an Java application is executed  please refer to the following sources    Chapter 12  Execution from the Java Language Specification  Third Edition  Chapter 5  Linking  Loading  Initializing from the Java Virtual Machine Specifications  Second Edition  A Closer Look at the  Hello World  Application from the Java Tutorials      The run method is the entry point for a new Thread or an class implementing the Runnable interface  It is not called by the Java Virutal Machine when it is started up by the java command   As a Thread or Runnable itself cannot be run directly by the Java Virtual Machine  so it must be invoked by the Thread start   method  This can be accomplished by instantiating a Thread and calling its start method in the main method of the application   public class MyRunnable implements Runnable       public void run                 System out println  Hello World                public static void main String   args                new Thread new MyRunnable    start              For more information and an example of how to start a subclass of Thread or a class implementing Runnable  see Defining and Starting a Thread from the Java Tutorials     The init method is the first method called in an Applet or JApplet   When an applet is loaded by the Java plugin of a browser or by an applet viewer  it will first call the Applet init method  Any initializations that are required to use the applet should be executed here  After the init method is complete  the start method is called   For more information about when the init method of an applet is called  please read about the lifecycle of an applet at The Life Cycle of an Applet from the Java Tutorials   See also  How to Make Applets from the Java Tutorial

User · Answer

Java has a special static method   public static void main String   args            which is executed in a class when the class is started with a java command line     java Class   would execute said method in the class  Class  if it existed   public void run             is required by the Runnable interface  or inherited from the Thread class when creating new threads

User · Answer

The main method is the entry point of a Java application   Specifically when the Java Virtual Machine is told to run an application by specifying its class  by using the java application launcher   it will look for the main method with the signature of public static void main String      From Sun s java command page      The java tool launches a Java application  It does this by starting   a Java runtime environment  loading a specified class  and invoking that   class s main method       The method must be declared public and static  it must not return any   value  and it must accept a String array as a parameter  The method   declaration must look like the following   public static void main String args       For additional resources on how an Java application is executed  please refer to the following sources    Chapter 12  Execution from the Java Language Specification  Third Edition  Chapter 5  Linking  Loading  Initializing from the Java Virtual Machine Specifications  Second Edition  A Closer Look at the  Hello World  Application from the Java Tutorials      The run method is the entry point for a new Thread or an class implementing the Runnable interface  It is not called by the Java Virutal Machine when it is started up by the java command   As a Thread or Runnable itself cannot be run directly by the Java Virtual Machine  so it must be invoked by the Thread start   method  This can be accomplished by instantiating a Thread and calling its start method in the main method of the application   public class MyRunnable implements Runnable       public void run                 System out println  Hello World                public static void main String   args                new Thread new MyRunnable    start              For more information and an example of how to start a subclass of Thread or a class implementing Runnable  see Defining and Starting a Thread from the Java Tutorials     The init method is the first method called in an Applet or JApplet   When an applet is loaded by the Java plugin of a browser or by an applet viewer  it will first call the Applet init method  Any initializations that are required to use the applet should be executed here  After the init method is complete  the start method is called   For more information about when the init method of an applet is called  please read about the lifecycle of an applet at The Life Cycle of an Applet from the Java Tutorials   See also  How to Make Applets from the Java Tutorial

User · Answer

This is a peculiar question because it s not supposed to be a matter of choice   When you launch the JVM  you specify a class to run  and it is the main   of this class where your program starts   By init    I assume you mean the JApplet method  When an applet is launched in the browser  the init   method of the specified applet is executed as the first order of business   By run    I assume you mean the method of Runnable  This is the method invoked when a new thread is started    main  program start  init  applet start run  thread start   If Eclipse is running your run   method even though you have no main    then it is doing something peculiar and non-standard  but not infeasible  Perhaps you should post a sample class that you ve been running this way

User · Answer

as a beginner  i import acm packages  and in this package  run   starts executing of a thread  init   initialize the Java Applet

User · Answer

Java has a special static method   public static void main String   args            which is executed in a class when the class is started with a java command line     java Class   would execute said method in the class  Class  if it existed   public void run             is required by the Runnable interface  or inherited from the Thread class when creating new threads

User · Answer

This is a peculiar question because it s not supposed to be a matter of choice   When you launch the JVM  you specify a class to run  and it is the main   of this class where your program starts   By init    I assume you mean the JApplet method  When an applet is launched in the browser  the init   method of the specified applet is executed as the first order of business   By run    I assume you mean the method of Runnable  This is the method invoked when a new thread is started    main  program start  init  applet start run  thread start   If Eclipse is running your run   method even though you have no main    then it is doing something peculiar and non-standard  but not infeasible  Perhaps you should post a sample class that you ve been running this way

User · Answer

The main method is the entry point of a Java application   Specifically when the Java Virtual Machine is told to run an application by specifying its class  by using the java application launcher   it will look for the main method with the signature of public static void main String      From Sun s java command page      The java tool launches a Java application  It does this by starting   a Java runtime environment  loading a specified class  and invoking that   class s main method       The method must be declared public and static  it must not return any   value  and it must accept a String array as a parameter  The method   declaration must look like the following   public static void main String args       For additional resources on how an Java application is executed  please refer to the following sources    Chapter 12  Execution from the Java Language Specification  Third Edition  Chapter 5  Linking  Loading  Initializing from the Java Virtual Machine Specifications  Second Edition  A Closer Look at the  Hello World  Application from the Java Tutorials      The run method is the entry point for a new Thread or an class implementing the Runnable interface  It is not called by the Java Virutal Machine when it is started up by the java command   As a Thread or Runnable itself cannot be run directly by the Java Virtual Machine  so it must be invoked by the Thread start   method  This can be accomplished by instantiating a Thread and calling its start method in the main method of the application   public class MyRunnable implements Runnable       public void run                 System out println  Hello World                public static void main String   args                new Thread new MyRunnable    start              For more information and an example of how to start a subclass of Thread or a class implementing Runnable  see Defining and Starting a Thread from the Java Tutorials     The init method is the first method called in an Applet or JApplet   When an applet is loaded by the Java plugin of a browser or by an applet viewer  it will first call the Applet init method  Any initializations that are required to use the applet should be executed here  After the init method is complete  the start method is called   For more information about when the init method of an applet is called  please read about the lifecycle of an applet at The Life Cycle of an Applet from the Java Tutorials   See also  How to Make Applets from the Java Tutorial

User · Answer

Java has a special static method   public static void main String   args            which is executed in a class when the class is started with a java command line     java Class   would execute said method in the class  Class  if it existed   public void run             is required by the Runnable interface  or inherited from the Thread class when creating new threads

User · Answer

Java has a special static method   public static void main String   args            which is executed in a class when the class is started with a java command line     java Class   would execute said method in the class  Class  if it existed   public void run             is required by the Runnable interface  or inherited from the Thread class when creating new threads

User · Answer

The main method is the entry point of a Java application   Specifically when the Java Virtual Machine is told to run an application by specifying its class  by using the java application launcher   it will look for the main method with the signature of public static void main String      From Sun s java command page      The java tool launches a Java application  It does this by starting   a Java runtime environment  loading a specified class  and invoking that   class s main method       The method must be declared public and static  it must not return any   value  and it must accept a String array as a parameter  The method   declaration must look like the following   public static void main String args       For additional resources on how an Java application is executed  please refer to the following sources    Chapter 12  Execution from the Java Language Specification  Third Edition  Chapter 5  Linking  Loading  Initializing from the Java Virtual Machine Specifications  Second Edition  A Closer Look at the  Hello World  Application from the Java Tutorials      The run method is the entry point for a new Thread or an class implementing the Runnable interface  It is not called by the Java Virutal Machine when it is started up by the java command   As a Thread or Runnable itself cannot be run directly by the Java Virtual Machine  so it must be invoked by the Thread start   method  This can be accomplished by instantiating a Thread and calling its start method in the main method of the application   public class MyRunnable implements Runnable       public void run                 System out println  Hello World                public static void main String   args                new Thread new MyRunnable    start              For more information and an example of how to start a subclass of Thread or a class implementing Runnable  see Defining and Starting a Thread from the Java Tutorials     The init method is the first method called in an Applet or JApplet   When an applet is loaded by the Java plugin of a browser or by an applet viewer  it will first call the Applet init method  Any initializations that are required to use the applet should be executed here  After the init method is complete  the start method is called   For more information about when the init method of an applet is called  please read about the lifecycle of an applet at The Life Cycle of an Applet from the Java Tutorials   See also  How to Make Applets from the Java Tutorial

User · Answer

as a beginner  i import acm packages  and in this package  run   starts executing of a thread  init   initialize the Java Applet

User · Answer

The main   method is the entry point for a Java application  run   is typically used for new threads or tasks   Where have you been writing a run   method  what kind of application are you writing  e g  Swing  AWT  console etc  and what s your development environment

User · Answer

The main   method is the entry point for a Java application  run   is typically used for new threads or tasks   Where have you been writing a run   method  what kind of application are you writing  e g  Swing  AWT  console etc  and what s your development environment

User · Answer

This is a peculiar question because it s not supposed to be a matter of choice   When you launch the JVM  you specify a class to run  and it is the main   of this class where your program starts   By init    I assume you mean the JApplet method  When an applet is launched in the browser  the init   method of the specified applet is executed as the first order of business   By run    I assume you mean the method of Runnable  This is the method invoked when a new thread is started    main  program start  init  applet start run  thread start   If Eclipse is running your run   method even though you have no main    then it is doing something peculiar and non-standard  but not infeasible  Perhaps you should post a sample class that you ve been running this way

User · Answer

The main   method is the entry point for a Java application  run   is typically used for new threads or tasks   Where have you been writing a run   method  what kind of application are you writing  e g  Swing  AWT  console etc  and what s your development environment

[java] Entry point for Java applications: main(), init(), or run()?

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