String Replace problem

What I have:

I've got a text "Hi {0}, my name is {1}."

开发者_运维问答

I've got a List<String> names = Arrays.asList("Peter", "Josh");

I'm trying to fit Peter where there's a {0} and Josh where there's a {1}.

What I want:

Hi Peter, my name is Josh.

Any ideas of how could I do it?

---

MessageFormat class is your friend. http://download.oracle.com/javase/1.5.0/docs/api/java/text/MessageFormat.html

                String aa = "Hi {0}, my name is {1}";

            Object[] bb = {"Peter" , "John"};

            System.out.println(MessageFormat.format(aa, bb));

---

Probably simplest would be to use one of the String.replaceXX ops in a loop. Eg,

String sourceString = "Hi {1}, my name is {2}."
for (i = 0; i < names.size(); i++) {
    String repText = names.get(i);
    sourceString = sourceString.replace("{" + (i+1) + "}", repText);
}

This is a bit inefficient, since it's bad form to repeatedly create new Strings vs using a StringBuffer or some such, but generally text replacement of this form would be a low-frequency operation, so simplicity trumps efficiency.

---

List<String> names = new ArrayList<String();
names.add("Peter");
names.add("Josh");
String str = "Hi {1}, my name is {2}.";
str = str.replaceFirst("{1}", names.get(0));
str = str.replaceFirst("{2}", names.get(1));

---

String text = "Hi {1}, my name is {2}.";
java.util.List<String> names = Arrays.asList("Peter", "Josh");
for(String s: names) text = text.replace("{" + (names.indexOf(s) + 1) + "}", s);

---

You would do something like this.

List<String> names = Arrays.asList("Peter", "Josh");
System.out.printf("Hi %s, my name is %s.", names.get(0), names.get(1));

and that would be it in just 2 lines of code.

---

List<String> names = new ArrayList<String>();
names.add("Peter");
names.add("Josh");
System.out.println("Hi " + names.get(0) + ", my name is " + names.get(1) + ".");

My apologies if I'm taking you too literally and you wanat something more generic but this will do exactly as you asked.

---

I'm assuming that your list will have the correct number of elements.

`String s = "Hi {1}, my name is {2}.";`
for(int x = 1;x <= names.size();x++)
{
   s.replaceFirst("{" + x +"}",names.get(x - 1));
}