数字与字符串相互转换

 1 public class TestNumber {
 2   
 3     public static void main(String[] args) {
 4         int i = 5;
 5          
 6         //方法1
 7         String str = String.valueOf(i);
 8          
 9         //方法2
10         Integer it = i;
11         String str2 = it.toString();
12          
13     }
14 }

 1 public class TestNumber {
 2   
 3     public static void main(String[] args) {
 4  
 5         String str = "999";
 6          
 7         int i= Integer.parseInt(str);
 8          
 9         System.out.println(i);
10          
11     }
12 }