阅读下列程序，写出程序运行结果。
public class C3302 {
public static void main(String［］args) {
int［］［］a={{1,2,3},{4,5,6}};
System.out.println(a.length+","+a［0］.length+","+a［1］［1］);
String［］s={"a","b"};
f3302(s［0］,s［1］);
System.out.println(s［0］+","+s［1］);
Strings1="abc",s2="123";
s1+="xyz"; s2.concat("xyz");
System.out.println(s1+","+s2);}
staticvoidf3302(Stringx,Stringy){Stringz=x;x=y;y=z;}}
运行结果：2,3,5a,babcxyz,123
