Java.lang.Compiler.compileClasses() Method

Description

The java.lang.Compiler.compileClasses() method compiles all classes whose name matches the specified string.

Declaration

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

public static boolean compileClasses(String string)

Parameters

• string -- This is the name of the classes to compile.

Return Value

This method returns true if the compilation succeeded; false if the compilation failed or no compiler is available.

Exception

• NullPointerException -- if string is null.

Example

The following example shows the usage of java.lang.Compiler.compileClasses() 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);
        
     /* returns false if the compilation failed or no compiler is 
     available */
     String str = "CompilerDemo";
     boolean retval = Compiler.compileClasses(str);
   
     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 CompilerDemo
class SubClass1
Return Value = false