99年用QB写过工资管理系统。转行后现在只会让一个字符在屏幕上乱跳

楼主6的不行

瞎写玩玩，长时间不用Java，不太熟练。

JAVA 代码复制

class Student{
    private String stuNo = "";
    private String stuName = "";
    public Student(String no, String name){
        this.stuNo = no;
        this.stuName = name;
    }
    public String getStuNo(){
        return stuNo;
    }
    public void setStuNo(stuNo){
        this.stuNo = stuNo;
    }
    public String getStuName(){
        return stuName;
    }
    public void setStuName(name){
        this.stuName = name;
    }
    public String toString(){
        return "姓名：" + stuName + " " + "学号：" + stuNo;
    }
    public boolean equals(Object obj){
        if(!(obj instanceof String)) return false;
        Student stu = (Student)obj;
        return stuNo.equals(stu.getStuNo());
    }
}

class Student{


    private String stuNo = "";


    private String stuName = "";


    public Student(String no, String name){


        this.stuNo = no;


        this.stuName = name;


    }


    public String getStuNo(){


        return stuNo;


    }


    public void setStuNo(stuNo){


        this.stuNo = stuNo;


    }


    public String getStuName(){


        return stuName;


    }


    public void setStuName(name){


        this.stuName = name;


    }


    public String toString(){


        return "姓名：" + stuName + " " + "学号：" + stuNo;


    }


    public boolean equals(Object obj){


        if(!(obj instanceof String)) return false;


        Student stu = (Student)obj;


        return stuNo.equals(stu.getStuNo());


    }


}

JAVA 代码复制

import java.io.*;
public class DateConvert{
    public static void main(String[] args){
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String input = br.readline();
        int first_index = input.indexOf('/');
        int last_index = input.lastIndexOf('/');
        if(first_index < 0 || last_index == first_index){
            System.out.println("无效的日期格式");
            return;
        }
        String month = input.substring(0, first_index - 1);
        String day = input.substring(first_index + 1, last_index - 1);
        String year = input.substring(last_index + 1);
        System.out.println(year + "年" + month + "月" + day + "日")；
    }
}

import java.io.*;


public class DateConvert{


    public static void main(String[] args){


        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));


        String input = br.readline();


        int first_index = input.indexOf('/');


        int last_index = input.lastIndexOf('/');


        if(first_index < 0 || last_index == first_index){


            System.out.println("无效的日期格式");


            return;


        }


        String month = input.substring(0, first_index - 1);


        String day = input.substring(first_index + 1, last_index - 1);


        String year = input.substring(last_index + 1);


        System.out.println(year + "年" + month + "月" + day + "日")；


    }


}

只写了方法，main方法调用过程自己补上。

JAVA 代码复制

public class StringCounter{
    public static void main(String[] args){}
    public static void countLettersAndNumbers(String str){
        int letter_count = 0, number_count = 0;
        char ch = NULL;
        for(int i = 0;i < str.length();i++){
            ch = str.charAt(i);
            if(ch >= 'A' && ch <= 'Z' || ch >= 'a' && ch <= 'z') letter_count += 1;
            if(ch >= '0' && ch <= '9') number_count += 1;
        }
        System.out.println("字母数：" + letter_count);
        System.out.println("数字数：" + number_count);
    }
}

public class StringCounter{


    public static void main(String[] args){}


    public static void countLettersAndNumbers(String str){


        int letter_count = 0, number_count = 0;


        char ch = NULL;


        for(int i = 0;i < str.length();i++){


            ch = str.charAt(i);


            if(ch >= 'A' && ch <= 'Z' || ch >= 'a' && ch <= 'z') letter_count += 1;


            if(ch >= '0' && ch <= '9') number_count += 1;


        }


        System.out.println("字母数：" + letter_count);


        System.out.println("数字数：" + number_count);


    }


}

这个能稍微简单点，但是效率差，有效率高的版本这里没写：

JAVA 代码复制

String str = "测试字符串";
int counts = str.split("朋友").length();

String str = "测试字符串";


int counts = str.split("朋友").length();

借助正则表达式：

JAVA 代码复制

//需要import java.util.regex;
String str = "测试字符串";
String output = str;
String[] words_to_filter = {"敏感词1", "敏感词2"};
for(int i = 0;i < words_to_filter.length();i++){
    String word = words_to_filter[i];
    output = output.replaceAll(word, "**");
}

//需要import java.util.regex;


String str = "测试字符串";


String output = str;


String[] words_to_filter = {"敏感词1", "敏感词2"};


for(int i = 0;i < words_to_filter.length();i++){


    String word = words_to_filter[i];


    output = output.replaceAll(word, "**");


}

w完全只能看这各位大触们聊了

taroxd 发表于 2015-8-20 13:23
Ruby 真简单，看了楼主的「提示」就坚决不想学 Java 了

对了 Struct和

RUBY 代码复制

class Student
  attr_reader :stuNo
  attr_reader :name
  def initialize(stuNo, name)
    @stuNo = stuNo
    @name = name
  end
end

class Student


  attr_reader :stuNo


  attr_reader :name


  def initialize(stuNo, name)


    @stuNo = stuNo


    @name = name


  end


end

这种定义的区别在什么地方
嗯 另外一种鬼畜写法：

RUBY 代码复制

class Student < Hash
        def method_missing(m, *args, &block)
                return self.has_key?(m) ? self[m] : super
        end
end
 
a = Student[:stuNo,1,:name,"td"]

class Student < Hash


        def method_missing(m, *args, &block)


                return self.has_key?(m) ? self[m] : super


        end


end


 


a = Student[:stuNo,1,:name,"td"]

墨凌羽 发表于 2015-8-20 18:44
想起折腾ruby 差不多有一个月的时间再折腾字符串处理之类的【csv读取、xml读取、括弧匹配什么的 ...

Ruby 真简单，看了楼主的「提示」就坚决不想学 Java 了

RUBY 代码复制

Student = Struct.new(:stuNo, :name) do
  def equals(others)
    self.stuNo == others.stuNo
  end
 
  def toString
    "姓名:#{name}\t学号:#{stuNo}"
  end
end
 
month, day, year = gets.split('/')
"#{year}年#{month}月#{day}日", year, month, day
 
"随机字符串".count 'A-z'
"随机字符串".count '0-9'
 
"一段歌词".scan('朋友').size
 
"有敏感词的内容".gsub Regexp.union('敏感词', '内容'), ''

Student = Struct.new(:stuNo, :name) do


  def equals(others)


    self.stuNo == others.stuNo


  end


 


  def toString


    "姓名:#{name}\t学号:#{stuNo}"


  end


end


 


month, day, year = gets.split('/')


"#{year}年#{month}月#{day}日", year, month, day


 


"随机字符串".count 'A-z'


"随机字符串".count '0-9'


 


"一段歌词".scan('朋友').size


 


"有敏感词的内容".gsub Regexp.union('敏感词', '内容'), ''

想起折腾ruby 差不多有一个月的时间再折腾字符串处理之类的【csv读取、xml读取、括弧匹配什么的

虽然我也不会，但我总觉得这是属于例题里面一类的