Java初学Text8---枚举.包装类.字符串
作业：
1：定义一个方法接受枚举类型的参数，用户类：姓名，性别，年龄，设置性别的时候，写一个关于性别的枚举.
package Week5class;import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;@Data
@AllArgsConstructor
@NoArgsConstructor
public class User {private Sex.sex sex;private String name;private int age;}
package Week5class;public class Sex {public enum sex{男,女}
}
package Week5class;public class DemoUser {public static void main(String[] args) {User user=new User();user.setAge(12);user.setName("张三");user.setSex(Sex.sex.男);System.out.println(user);}
}
运行结果：
2.
package Week5class;import lombok.Data;@Data
public class SongToString {public static void main(String[] args) {String s0="长亭外 古道边 芳草碧连天 晚风拂 柳笛声残 夕阳山外山";String[] arr=s0.split(" ");System.out.println("***原歌词***");System.out.println(s0);System.out.println("***拆封后歌词***");
// for (int i = 0; i 运行结果：
3.
package Week5class;public class Submit {public boolean CheckFirstword(String document){char s=document.charAt(0);if(s>='A'&&s<='Z'){return true;}return false;}public boolean Checkjava(String document){int x=document.indexOf("java");if(x==document.length()-4){return true;}return false;}public boolean Checkdot(String document){int x=document.indexOf(".");int y=document.lastIndexOf(".");if(x==y&&x!=-1){return true;}return false;}public boolean Checkat(String email){int x=email.indexOf("@");int y=email.lastIndexOf("@");if(x==y&&x!=-1){return true;}return false;}public boolean Checklastword(String email){int x=email.indexOf(".com");int y=email.indexOf(".cn");if((x==email.length()-4)||(y==email.length()-3)){return true;}return false;}
}package Week5class;import java.util.Scanner;public class DemoSubmit {public static void main(String[] args) {int flag=0;Scanner scanner=new Scanner(System.in);System.out.println("请输入文件名：");String x=scanner.next();Submit submit=new Submit();boolean b1=submit.Checkdot(x);boolean b2=submit.CheckFirstword(x);boolean b3=submit.Checkjava(x);if(b1==true&&b2==true&&b3==true){System.out.println("文件格式正确");flag=1;}else {System.out.println("文件格式不正确");}if(flag==1){System.out.println("请输入你的邮箱：");String y=scanner.next();boolean b4=submit.Checkat(y);boolean b5=submit.Checklastword(y);if(b4==true&&b5==true){System.out.println("提交成功");}else {System.out.println("邮箱不正确");}}else {System.out.println("提交失败");}}
}
运行结果：
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