![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-56/ti_inject-812ce.png)
阅读下列代码,输出结果中包含( )字符串。 public class Demo{ public static void main(String [] args){ String s1 =new String (“-”); String s2=”abc”; double a=8.98; if(s2.equals(“Abc”)){ s1 =s1 +”.e1”; }else{ s1 =s1 +”.e2”; } if(s2. length()==3){ s1 =s1 +”.e3”; } if(a<=8){ s1 =s1 +”.e4”; } System.out.println(s1 ); } }