Java.lang.Compiler.compileClasses() Method

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