println

问题 When I write: System.out.println("Give grade: ", args[0]); It gives the error: The method println(String) in the type PrintStream is not applicable for the arguments (String, String). Why is this so? However, when I try to write System.out.println("Give grade :"); System.out.println(args[0]); No error shows. Is there a way I can write the above in one line of println() ? 回答1: The two that work only take one parameter, the one that fails takes two. Any chance you have a Javascript or Python

问题 I'm trying to wrap my head around a problem I have in a programming set. We're supposed to write code that reads from a file and prints it out. I get that, I can do it. What he wants us to do is have it print out in reverse. the file reads: abc 123 987 He wants: 987 123 abc The code, as it is, is as follows: { FileReader n=new FileReader("F:\\Java\\Set 8\\output1.txt"); Scanner in=new Scanner(n); int l; while (in.hasNext()) { l=in.nextInt(); System.out.println(l); } in.close(); } } Yes, I am

问题 I am programming Arduino and I am trying to Serial.print() bytes in hexadecimal format "the my way" (keep reading for more information). That is, by using the following code byte byte1 = 0xA2; byte byte2 = 0x05; byte byte3 = 0x00; Serial.println(byte1, HEX); Serial.println(byte2, HEX); Serial.println(byte3, HEX); I get the following output in the Serial Monitor: A2 5 0 However I would like to output the following: A2 05 00 In words, I would like to print the "full" hexadecimal value including

问题 If you run the following in Playgroud class Test { var description:String { return "This is Test" } } class Test1:NSObject { override var description:String { return "This is Test" } } let t = Test() println(t) let t1 = Test1() println(t1) you see that the first println will output some debugger blurb while the second echoes the contents of description . So: is there a way that "normal" classes will be treated the same way as subclasses of NSObject so println will respect the contents of a

问题 I have a multi-threaded Java application that will output information about a message it receives to the console for debugging purposes. Each time the application receives a message, it will call a System.out.println(String) on the message. The problem that I am having is that if the application gets flooded with messages, System.out.println() prints erroneous information (like old buffer information). This is leading me to wonder if there is a threading issue where multiple threads are

问题 I have a big project to debug, and I was wondering if there is anyway I could use to change the System.out.println method in the output of eclipse for example : System.out.println("I want this to be red"); System.out.println("I want this to be blue"); System.out.println("I want this to be yellow"); System.out.println("I want this to be magenta"); for more readability. EDIT with sysout I have this with syserr I have this 回答1: Within Eclipse, the simplest approach would be to use System.err

问题 I was wondering if there was a difference between these two e.g. System.out.println("Hello World"); and println("Hello World"); I know they print the same thing, but is there anything different? (I'm new to java, so I don't know so far) In other words, does the "System.out" change anything? 回答1: Yes, there is a difference, because they are not calling the same method. Assuming the second statement actually compile, it means that the println("Hello World") call is for a method that is either:

问题 anyone have idea to slove my problem? I need to use servlet to println the jsp like this. <select name="users_province" id="users_province" class="form-control"> <option value="0" selected="selected">Province</option> <c:forEach items="${provincesList}" var="lists" > <option value="${lists.provinceCode}">${lists.provinceNameTh}</option> </c:forEach> </select> This is my servlet code. pw.println("<select name=\"users_province\" id=\"users_province\" class=\"form-control\">"); pw.println("

问题 Here is the android.util.Log source code. At the very bottom (line 340), what is in the method: public static native int println_native(int bufID, int priority, String tag, String msg); i guess println_native() is more or less like its println() , just with an int bufID different. But even i got the codes of println_native() , i still lack com.android.internal.os.RuntimeInit (line 19, the import ) to simulate android.util.Log in old Android version. 回答1: Just did some digging in the android

问题 Where does tomcat put the System.out.println output ? I'm not interested in out.println . I'm using a system that uses system.out to log issues, like login success/fail, and I need to look to that generated "log". 回答1: It usually prints to catalina.out. It is highly unrecommended to log using system.out.println() from several reasons: you cannot control which messages are logged and which aren't unless you change the code catalina.out just grow all the time, and you cannot move it so that