1 package com.jdk7.chapter5;
2
3 public class BasicToString {
4 /**
5 * 基本数据类型转换为String
6 * 方法一：String.valueOf(基本数据类型)
7 * 方法二：基本数据类型的封装类.valueOf(基本数据类型)
8 * 方法三：直接在输出流中打印
9 */
10 public static void intToStr(
int n){
11 System.out.println("String.valueOf("+n+")>"+
String.valueOf(n));
12 System.out.println("Integer.valueOf("+n+").toString()>"+
Integer.valueOf(n).toString());
13 System.out.println("空格+"+n+">"+
n);
14 }
15
16 /**
17 * String转换为基本数据类型的封装类
18 * 方法一：基本数据类型的封装类.parseXxx(String)
19 * 方法二：new 基本数据类型的封装类(String)
20 * @param str
21 */
22 public static void strToInt(String str){
23 System.out.println("Integer.parseInt("+str+")>"+
Integer.parseInt(str));
24 System.out.println("(new Integer("+str+")).toString()>"+(
new Integer(str)).toString());
25 }
26
27 public static void doubleToStr(
double dou){
28 System.out.println("String.valueOf("+dou+")>"+
String.valueOf(dou));
29 System.out.println("Double.valueOf("+dou+").toString()>"+
Double.valueOf(dou).toString());
30 System.out.println("空格+"+dou+">"+
dou);
31 }
32
33 public static void strToDouble(String src){
34 System.out.println("Double.parseDouble("+src+")>"+
Double.parseDouble(src));
35 System.out.println("new Double("+src+")>"+
new Double(src));
36 }
37 public static void main(String[] args) {
38 BasicToString.intToStr(10
);
39 BasicToString.strToInt("35536"
);
40 BasicToString.doubleToStr(4234.354
);
41 BasicToString.strToDouble("7994.46378"
);
42 }
43 }
44
45
46 执行结果：
47 String.valueOf(10)>10
48 Integer.valueOf(10).toString()>10
49 空格+10>10
50 Integer.parseInt(35536)>35536
51 (
new Integer(35536)).toString()>35536
52 String.valueOf(4234.354)>4234.354
53 Double.valueOf(4234.354).toString()>4234.354
54 空格+4234.354>4234.354
55 Double.parseDouble(7994.46378)>7994.46378
56 new Double(7994.46378)>7994.46378
转载于:https://www.cnblogs.com/celine/p/8460317.html
