Java-构造一个字符串

实用StringBuffer构造字符串

 package com.tj;

 public class MyClass implements Cloneable {
     public static void main(String[] args) {
         StringBuffer buf = new StringBuffer("Java");

         // Append
         buf.append(" Almanac v1/");
         buf.append("3");
         System.out.println(buf);

         // Set
         int index = 15;
         buf.setCharAt(index, '.');
         System.out.println(buf);

         // Insert
         index = 5;
         buf.insert(index, "Developers ");
         System.out.println(buf);

         //Replace
         int start = 27;
         int end = 28;
         buf.replace(start, end, "4");
         System.out.println(buf);

         //Delete
         start = 24;
         end = 25;
         buf.delete(start, end);
         System.out.println(buf);

         //Convert to string
         String s = buf.toString();
         System.out.println(s);
     }
 }