Test2.java

public class Test2 {
	public static void main(String args[]){
		Example ex=new Example(); 
		ex.change(ex.str,ex.ch);
		System.out.print(ex.str+"and");
		System.out.print(ex.ch);
	} 
	public void change(String str,char ch[])
	{
		str="test ok"; 
		String s="g"; 
	} 
	}
}