String type passing is a value pass, and char[] type passing is an implementation of a reference pass _java

As shown below:

Package com.lstc.test;

public class TestDemo3 {
	String str = new String ("Hello");
	char[] ch = {' A ', ' B '};

	public static void Main (string[] args) {
		TestDemo3 t = new TestDemo3 ();
		T.change (T.str, t.ch);//string is the encapsulated class, is the value pass, and the char array is the reference pass
		System.out.println (T.str + "and" + t.ch[0] + t.ch[1);
	} Public

	void Change (String str, char[] ch) {
		str = ' Test ok ';
		Ch[0] = ' C ';
	}
}

The result: STR is still the first element of Hello,ch, a into C.

The above is a small series for you to bring the string type is the value of delivery, char[] Type pass is a reference to the implementation of the full content of the realization, I hope to help you, a lot of support cloud Habitat Community ~