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

package com.jsample;

public class Credits {//将该Java程序命名为Credits
    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
        //set up from flim information
        String title = "Sharknado";//创建用于存储导演和演员以及影片信息的变量
        int year = 2013;           //其中一个是整型变量，其他都是字符串变量
        String director = "Anthony Ferrante";
        String role1 = "Fin";
        String actor1 = "Ian Ziering";
        String role2 = "April";
        String actor2 = "Tara Reid";
        String role3 = "George";
        String actor3 = "John Heard";
        String role4 = "Nova";
        String actor4 = "Cassie Scerbo";
        //display information
        System.out.println(title + " (" + year +")
" + //长语句，输出内容
            "A " + director + " film.

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

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

package com.jsample;

public class Favourite {
    public static void main(String[] args){
        String favorite = "chainsaw";
        String guess = "pool cue";
        System.out.println("Is Fin's favorite weapon a " + guess + "?");
        System.out.println("Answer: " + favorite.equals(guess));
        System.out.println("Change guess's value from pool cue to chainsaw");
        guess = "chainsaw";
        System.out.println("Answer: " + favorite.equals(guess));
    }
}

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

package com.jsample;

public class CreditsHighCase {
    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
        //set up from film information
        String title = "Sharknado";//创建用于存储导演和演员以及影片信息的变量

        int year = 2013;           //其中一个是整型变量，其他都是字符串变量
        String director = "Anthony Ferrante";
        director = director.toUpperCase();

        String role1 = "Fin";
        role1 = role1.toUpperCase();

        String actor1 = "Ian Ziering";
        actor1 = actor1.toUpperCase();

        String role2 = "April";
        role2 = role2.toUpperCase();

        String actor2 = "Tara Reid";
        actor2 = actor2.toUpperCase();

        String role3 = "George";
        role3 = role3.toUpperCase();

        String actor3 = "John Heard";
        actor3 = actor3.toUpperCase();

        String role4 = "Nova";
        role4 = role4.toUpperCase();

        String actor4 = "Cassie Scerbo";
        actor4 = actor4.toUpperCase();
        //display information
        System.out.println(title + " (" + year +")
" + //长语句，输出内容
                "A " + director + " film.

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

输出：

Sharknado (2013)
A ANTHONY FERRANTE film.

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