Java.lang.Compiler.command() Method

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Description

The java.lang.Compiler.command() method examines the argument type and its fields and perform some documented operation.

Declaration

Following is the declaration for java.lang.Compiler.command() method

public static boolean command(Object arg)

Parameters

  • Object arg -- a compiler-specific argument

Return Value

This method returns a compiler-specific value, including null.

Exception

  • NullPointerException -- if the compiler doesn't like a null arg.

Example

The following example shows the usage of java.lang.Compiler.command() method.

package com.tutorialspoint;

import java.lang.*;

public class CompilerDemo {

   public static void main(String[] args) {
       
     CompilerDemo cls = new CompilerDemo();
     CompilerDemo subcls = new SubClass1();
   
     // class CompilerDemo
     Class c = cls.getClass(); 
     System.out.println(c);
 
     // sub class SubClass1
     Class c1 = subcls.getClass();
     System.out.println(c1);
      
     /* Let's compile CompilerDemo class using command method */
     Object retval = Compiler.command("javac CompilerDemo");
   
     System.out.println("Return Value = " + retval); 
   }
} 

class SubClass1 extends CompilerDemo {
   // sub class
} 

Let us compile and run the above program, this will produce the following result:

class com.tutorialspoint.CompilerDemo
class com.tutorialspoint.SubClass1
Return Value = null



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