![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
下面程序的执行的结果是______。 public class ex48 { public static void main(String[] args) { String s1 = 'abc' + 'def'; String s2 = new String(sl); if(s1 == s2) System.out.println ( '== succeeded'); if (s1.equals (s2) ) System.out.println ('.equals () succeeded'); } }