聊天室的设计与实现
985 2023-04-03 04:27:42
"001"System.out.println(String.format("%03d", 1));" /> "001"System.out.println(String.format("%03d", 1));" />
//实现将数字补全为3位数
//String.format("%03d", 1); // => "001"
System.out.println(String.format("%03d", 1));