Understanding ToolProvider Class in the Javax.Tools Package

An important usage would be to find the compiler that is available in the current context. The method getSystemJavaCompiler() returns the Java compiler if available or else returns null.

import javax.tools.*;

public class JavaxTools
{
    public static void main(String[] args) 
   {
      JavaxTools javaxTools = new JavaxTools();
      javaxTools.proceed();
   }
   
   private void proceed()
   {
      System.setProperty( "java.home", "/usr/bin/java/jdk1.8.0_102");
      JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();      
      System.out.println(compiler);
   }
}

/*

Expected output:

[root@mypc]# java JavaxTools
com.sun.tools.javac.api.JavacTool@7d4991ad

Note: The output need not be same as the one specified here */