public class TestExchange {
String str = new String("1");
char[] arr = { 'a', 'b', 'c' };
public static void main(String[] args) {
TestExchange te = new TestExchange();
te.exchange(te.str, te.arr);
System.out.print(te.str + " ");
System.out.print(te.arr);
}
public void exchange(String str, char arr[]) {
str = "2";
arr[0] = 'd';
}
}
输出
1 dbc
分析: