Java 编程练习：比较两个花名册

//在这里补全代码片段 int len1 = roster1.size(); int len2 = roster2.size(); System.out.println(len1); System.out.println(len2); if(len1 != len2) { System.out.println('不相同'); } else { boolean flag = true; for(int i = 0; i < len1; i++) { if(!roster1.get(i).equals(roster2.get(i))) { flag = false; break; } } if(flag) { System.out.println('相同'); } else { System.out.println('不相同'); } }