println

I have created an activity in which i insert some records into a mysql database. I declared a global variable named lastInsertId . When i try to println the variable inside the onResponse method, works fine but when i try to println outside the method returns null . I need to use this variable also outside the method. What can be done? Here is my code: String insertUrl = "http://localhost/file.php"; String lastInsertId; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); RequestQueue requestQueue = Volley.newRequestQueue(getApplicationContext());

I'm trying to print the test data used in webdriver test inside a print line in Java I need to print multiple variables used in a class inside a system.out.print function (printf/println/ whatever). Can you guys help me? public String firstname; public String lastname; firstname = "First " + genData.generateRandomAlphaNumeric(10); driver.findElement(By.id("firstname")).sendKeys(firstname); lastname = "Last " + genData.generateRandomAlphaNumeric(10); driver.findElement(By.id("lastname")).sendKeys(lastname); I need those print in a print statement as: First name: (the variable value I used) Last

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". 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 tomcat will create another one. A better solution is to use one of the popular (and mature) logging frameworks:

I tried the following code: fn main() { let v2 = vec![1; 10]; println!("{}", v2); } But the compiler complains: error[E0277]: `std::vec::Vec<{integer}>` doesn't implement `std::fmt::Display` --> src/main.rs:3:20 | 3 | println!("{}", v2); | ^^ `std::vec::Vec<{integer}>` cannot be formatted with the default formatter | = help: the trait `std::fmt::Display` is not implemented for `std::vec::Vec<{integer}>` = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead = note: required by `std::fmt::Display::fmt` Does anyone implement this trait for Vec<T> ? Matthieu M

The macro println! in Rust always leaves a newline character at the end of each output. For example println!("Enter the number : "); io::stdin().read_line(&mut num); gives the output Enter the number : 56 I don't want the user's input 56 to be on a new line. How do I do this? sjagr You can use the print! macro instead. print!("Enter the number : "); io::stdin().read_line(&mut num); Beware: Note that stdout is frequently line-buffered by default so it may be necessary to use io::stdout().flush() to ensure the output is emitted immediately. It's trickier than it would seem at first glance. Other

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 Within Eclipse, the simplest approach would be to use System.err.println for lines you want to be in red - I believe that's the default. (You can change it in Preferences ->

I am invoking a function that is printing some string in my console/standard output. I need to capture this string. I cannot modify the function that is doing the printing, nor change runtime behavior through inheritance. I am unable to find any pre-defined methods that will allow me to do this. Does the JVM store a buffer of printed contents? Does anyone know of a Java method that will aid me? You could temporarily replace System.err or System.out with a stream that writes to string buffer. You can redirect the standard output by calling System.setOut(myPrintStream); Or - if you need to log