Here I am using another GUI/IDE, Eclipse, along with handy command line sdk.

The features to be noted

The example code

public class test {
public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println("Hi");
process("hi eclipse calling from static");
test tt = new test();
tt.method_2("call through an object");
}
//static void process(String str)
void process(String str)
{
System.out.println(str);
}
void method_2(String str)
{
System.out.println(str);
}
}
If you note two arrows and the word underlined with a squiggly line, show an error that generated when a static method tries to call a non-static method . You could have called this method via object, but a static member method can be called by method's name like process().
 
Exception in thread "main" java.lang.Error: Unresolved compilation problem:
Cannot make a static reference to the non-static method process(String) from the type test
at test.main(test.java:10)
 
at the completion of run
 

public class test {
public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println("Hi");
process("hi eclipse calling from static");
test tt = new test();
tt.method_2("call through an object");
}
static void process(String str)
{
System.out.println(str);
}
void method_2(String str)
{
System.out.println(str);
}
}
 
However, other methods can be used via instances of the class, created in the client method. In the example below, method_2 was used via the tt.method_2("a string");
Complete Code :

import java.io.*;
import javax.swing.JOptionPane;
import java.net.URI;

public class test {

public test() {
// TODO Auto-generated constructor stub

}
public static void main(String[] args)
throws Exception {
// TODO Auto-generated method stub
test tt = new test();
try {
//
System.out.println("Hi");
process("hi eclipse calling from static");
tt.method_2("call through an object");
//
} catch (NumberFormatException exc) {
//
}
}
static void process(String str)
{
System.out.println(str);
}
void method_2(String str)
{
System.out.println(str);
}
}// end of class template