使用return string.format（...）在Java中格式化字符串

Question

说我想要返回这样的内容： “标题 bookTitle ，作者 bookAuthor ：$ 费用”

粗体是变量。 我无法弄清楚如何使用string.format（“％s ..，blah blah”）

返回此内容

Answer 1

String title = "bookTitle";
String author = "bookAuthor";
double cost = 100;
String text = String.format("Title %s, Author %s: $%.2f", title, author, cost);
System.out.println(text); // prints "Title bookTitle, Author bookAuthor: $100.00"
// or System.out.pritnf("Title %s, Author %s: $%.2f", title, author, cost);

Answer 2

2个字符串和精度为2的浮点

String.format("Title %s, Author %s: $%f.2", bookTitle, bookAuthor, cost);

Answer 3

String fs;
fs = String.format("Title %t, Author %a: $%c", bookTitle, bookAuthor, cost);
System.out.println(fs);

http://download.oracle.com/javase/tutorial/java/data/strings.html