Java替换与变量匹配

Question

/* Look for phone numbers starting with a 0 after a space
character and replace the 0 with "+44 (0)" */

    import java.util.regex.*;

    public class Reg6 {

        public static void main (String [] args) {

            String variable1 = "test";
            Pattern phone = Pattern.compile("\\s0");
            Matcher action = phone.matcher(args[0]);
            String worldwide = action.replaceAll(" +44 (0) ");
            System.out.println(worldwide);

        }
    }

如何将variable1放入replaceAll方法？如果有一个字符串{$ variable_1}我希望用我的variable_1替换它可能吗？

就像在php模板中一样

“{$ test}” - 我想使用在字符串中匹配的名称，找到与此字符串匹配的变量，并将其置于此处，将所有变量全部替换为此变量值

就像在模板中一样

Answer 1

您不必使用模式或匹配 试试看

    String number ="028346";
    if(number.startsWith("0"))
        System.out.println("+44 (0)" + number.substring(1));

Answer 2

也许你想要这个：

Pattern varMatch = Pattern.compile("\\{\\$variable_1\\}");
Matcher action = varMatch.matcher(worldwide);
worldwide = action.replaceAll(variable1);
System.out.println(worldwide);