从零自学Java-4.使用字符串来交流

1.使用字符串来存储文本；

2.在程序中显示字符串；

3.在字符串中包含特殊的字符；

4.拼接字符串；

5.在字符串中包含变量；

6.比较字符串；

7.判断字符串的长度；

程序Credits：显示一部电影的导演和演员名单

 1 package com.jsample;
 2 
 3 public class Credits {//将该Java程序命名为Credits
 4     public static void main(String[] args){//main()块语句的开头，程序所有功能都在这里完成
 5         //set up from flim information
 6         String title = "Sharknado";//创建用于存储导演和演员以及影片信息的变量
 7         int year = 2013;           //其中一个是整型变量，其他都是字符串变量
 8         String director = "Anthony Ferrante";
 9         String role1 = "Fin";
10         String actor1 = "Ian Ziering";
11         String role2 = "April";
12         String actor2 = "Tara Reid";
13         String role3 = "George";
14         String actor3 = "John Heard";
15         String role4 = "Nova";
16         String actor4 = "Cassie Scerbo";
17         //display information
18         System.out.println(title + " (" + year +")
" + //长语句，输出内容
19             "A " + director + " film.

"  +           //换行符
用于换行
20             role1 + "	" + actor1 + "
" +              //制表符	用于对齐
21             role2 + "	" + actor2 + "
" +
22             role3 + "	" + actor3 + "
" +
23             role4 + "	" + actor4);
24     }//结束main()函数
25 }//程序结束

View Code

输出：

Sharknado (2013)
A Anthony Ferrante film.

Fin Ian Ziering
April Tara Reid
George John Heard
Nova Cassie Scerbo

程序Favorite：通过比较两个字符串大小来完成猜词游戏

 1 package com.jsample;
 2 
 3 public class Favourite {
 4     public static void main(String[] args){
 5         String favorite = "chainsaw";
 6         String guess = "pool cue";
 7         System.out.println("Is Fin's favorite weapon a " + guess + "?");
 8         System.out.println("Answer: " + favorite.equals(guess));
 9         System.out.println("Change guess's value from pool cue to chainsaw");
10         guess = "chainsaw";
11         System.out.println("Answer: " + favorite.equals(guess));
12     }
13 }

View Code

输出：

Is Fin's favorite weapon a pool cue?
Answer: false
Change guess's value from pool cue to chainsaw
Answer: true

程序：CreditsHighCase：显示一部电影的导演和演员（大写）名单

 1 package com.jsample;
 2 
 3 public class CreditsHighCase {
 4     public static void main(String[] args){//main()块语句的开头，程序所有功能都在这里完成
 5         //set up from film information
 6         String title = "Sharknado";//创建用于存储导演和演员以及影片信息的变量
 7 
 8         int year = 2013;           //其中一个是整型变量，其他都是字符串变量
 9         String director = "Anthony Ferrante";
10         director = director.toUpperCase();
11 
12         String role1 = "Fin";
13         role1 = role1.toUpperCase();
14 
15         String actor1 = "Ian Ziering";
16         actor1 = actor1.toUpperCase();
17 
18         String role2 = "April";
19         role2 = role2.toUpperCase();
20 
21         String actor2 = "Tara Reid";
22         actor2 = actor2.toUpperCase();
23 
24         String role3 = "George";
25         role3 = role3.toUpperCase();
26 
27         String actor3 = "John Heard";
28         actor3 = actor3.toUpperCase();
29 
30         String role4 = "Nova";
31         role4 = role4.toUpperCase();
32 
33         String actor4 = "Cassie Scerbo";
34         actor4 = actor4.toUpperCase();
35         //display information
36         System.out.println(title + " (" + year +")
" + //长语句，输出内容
37                 "A " + director + " film.

"  +           //换行符
用于换行
38                 role1 + "	" + actor1 + "
" +              //制表符	用于对齐
39                 role2 + "	" + actor2 + "
" +
40                 role3 + "	" + actor3 + "
" +
41                 role4 + "	" + actor4);
42     }//结束main()函数
43 }

View Code

输出：

Sharknado (2013)
A ANTHONY FERRANTE film.

FIN IAN ZIERING
APRIL TARA REID
GEORGE JOHN HEARD
NOVA CASSIE SCERBO