The delivery of Java values

public class Example {   string str = new String ("good");   char[] ch = {' A ', ' B ', ' C '};   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";      Ch[0]= ' G ';   

Output GOODANDGBC   Java is really a pass value, not a reference
Cause: str= "Test OK" modifies the local variable str, not the member variable of the class str. The member variables of the class are not modified. The effect is that a variable name, like a global variable, is defined in the change method and treated as a local variable. Char ch[] is passed the address,

The delivery of Java values