String s = "abcdefsdsds"; String t ="dfs"; Listtmp = new ArrayList(); int l = s.length(); for(int i=0;i 不能直接t.contains(s.charAt(i) )
因为 字符串的contains方法不接收 char 而是 char sequence ,string可以参考 :https://www.runoob.com/java/java-string-contains.html

String s = "abcdefsdsds"; String t ="dfs"; Listtmp = new ArrayList(); int l = s.length(); for(int i=0;i 不能直接t.contains(s.charAt(i) )
因为 字符串的contains方法不接收 char 而是 char sequence ,string可以参考 :https://www.runoob.com/java/java-string-contains.html