格式化字符串中使用Java返回的String.Format（...）

Question

說我要回這樣的事： 「標題BOOKTITLE，作者BOOKAUTHOR：$ 成本」

雞舍粗體是變量。 我無法弄清楚如何返回此使用的String.Format（ 「％S ..，等等等等」）

Answer 1

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

Answer 2

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 3

2串和精度2

浮法

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