java - Error: Could not find or load main class com.example.Test -

i searching how access private field of class other class , found can done using reflect.field in following code, when try execute code error saying :error: not find or load main class com.example.test

why happening?

test.java

package com.example;  import java.lang.reflect.*;  class test {     public static void main(string[] args)         // ease of throwaway test. don't         // normally!         throws exception     {         other t = new other();         t.setstr("hi");         field field = other.class.getdeclaredfield("str");         field.setaccessible(true);         object value = field.get(t);         system.out.println(value);     } } 

other.java

package com.example;  class other {     private string str;     public void setstr(string value)     {         str = value;     } } 

compile both classes using javac

javac other.java  javac test.java 

and run java test

while in eclipse need select test class using run configuration option.