字符串特性2

package test;
public class Main {
    public static void main(String[] args) {
        String s1 = "WTY2002";  //s1 指向池中的 “WTY2002”
        String s2 = "java"; // s2 指向池中的 “java”
        String s5 = "WTY2002java"; //s5 指向池中的 “WTY2002java”
        String s6 = (s1 + s2).intern();//s6 指向池中的   “WTY2002java”
        System.out.println(s5 == s6); //T
        System.out.println(s5.equals(s6));//T
    }
}

package test;
public class Main {
    public static void main(String[] args) {
    }
}
class Test1 {
    String str = new String("hsp");
    final char[] ch = {'j', 'a', 'v', 'a'};
    public void change(String str, char ch[]) {
        str = "java";
        ch[0] = 'h';
    }
    public static void main(String[] args) {
        Test1 ex = new Test1();
        ex.change(ex.str, ex.ch);
        System.out.print(ex.str + " and ");
        System.out.println(ex.ch);
    }
}