发个计算字符中空格，字母，数字个数的java类

[bobo364]

今天天不错，昨天有人发的面试题中又有这样的问题，所以发个计算字符中空格，字母，数字个数的java类，水平次，如有不足，望指出，顺便撒20分

public class StringCaculate
{
private int i,j,k,l;
	public StringCaculate
	{
	i=0;j=0;k=0;l=0;
	}
public void caculate(String o)
	{
	StringBuffer aBuffer=new StringBuffer(o.lengh());
	char aCharacter;
	for(int m=0;m<o.lengh();m++)
		{
		aCharacter=o.charAt(i);
		if(Character.isLetter(aCharacter))
			i++;
		else if(Character.isDigit(aCharacter))
			j++;
		else
			l++;
		}
	System.out.println("有字母"+i+"个");
	System.out.println("有数字"+j+"个");
	System.out.println("有空格"+l+"个");
	}
}  



public class test
{
	public static void main(String[] args) 
	{
		String a="this is a string";
		StringCaculate.caculate(a);
	}
}

[Kevin2305]

lz肯定没有运行过，length都拼错了

[applerockhool]

对不？

public static void testCount(String str) {
		char[] array = str.toCharArray();
		int letter = 0, number = 0, space = 0;
		for (int i = 0; i < array.length; i++) {
			if (array[i] == ' ')
				space++;
			else if (array[i] >= '0' && array[i] <= '9')
				number++;
			else if (array[i] >= 'a' && array[i] <= 'z')
				letter++;
		}
		System.out.println("space=" + space + " number=" + number + " letter="
				+ letter);

	}

[shine333]

[Quote=引用 7 楼 applerockhool 的回复:]
对不？
Java codepublicstaticvoid testCount(String str) {char[] array= str.toCharArray();int letter=0, number=0, space=0;for (int i=0; i< array.length; i++) {if (array[i]=='')
space++;elseif (array[i]>='0'&& array[i]<='9')
number++;elseif (array[i]>='a'&& array[i]<='z')
letter++;
}
System.out.println("space="+ space+" number="+ number+" letter="+ letter);

}
[/Quote]
如果你只针对小写Ascii码

[lovepay1413]

全角。。。。半角。。。

[xingqiliudehuanghun]

一般这种程序都会加一个条件就是大数据量，从文件中读取等等，按才是关键所在。

[whut0802]

jf闪人

[bobo364]

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package exp1;

/**
 *
 * @author 364
 */
public class StringCaculate
{
private int i,j,k,l;
	public StringCaculate()
	{
	i=0;j=0;k=0;l=0;
	}
public void caculate(String o)
	{
	StringBuffer aBuffer=new StringBuffer(o.length());
	char aCharacter;
	for(int m=0;m<o.length();m++)
		{
		aCharacter=o.charAt(m);
		if(Character.isLetter(aCharacter))
			i++;
                else if(Character.isDigit(aCharacter))
			j++;
                else 
		        l++;
		}
	System.out.println("有字母"+i+"个");
	System.out.println("有数字"+j+"个");
	System.out.println("有空格"+l+"个");
	}
}
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package exp1;

/**
 *
 * @author bobo364
 */
class test
{
	public static void main(String[] args)
	{
		String a="this is a string";
		StringCaculate c=new StringCaculate();
                c.caculate(a);
	}
}

回家用netbean修改测试通过的版本，顺便关帖

[shine333]

[Quote=引用 12 楼 bobo364 的回复:]
Java code/*
* To change this template, choose Tools | Templates
* and open the template in the editor.*/package exp1;/**
*
*@author 364*/publicclass StringCaculate
{privateint i,j,k,l;public StringCaculate()
{
i=0;j=0;k=0;l=0;
}publicvoid caculate(String o)
{
StringBuffer aBuffer=new StringBuffer(o.length());char aCharacter;for(int m=0;m<o.length();m++)
{
aCharacter=o.charAt(m);if(Character.isLetter(aCharacter))
i++;elseif(Character.isDigit(aCharacter))
j++;else
l++;
}
System.out.println("有字母"+i+"个");
System.out.println("有数字"+j+"个");
System.out.println("有空格"+l+"个");
}
}/*
* To change this template, choose Tools | Templates
* and open the template in the editor.*/package exp1;/**
*
*@author bobo364*/class test
{publicstaticvoid main(String[] args)
{
String a="this is a string";
StringCaculate c=new StringCaculate();
c.caculate(a);
}
}

回家用netbean修改测试通过的版本，顺便关帖
[/Quote]

LZ,还是每次有测试连续调用！
c.caculate(a);
c.caculate(a);
c.caculate(a);

[kf156]

LZ貌似没考虑到字符串除了可以有空格、字母、数字外，还能有符号或其他文字

[shine333]

大哥，不知道你有没有测试过

StringCaculate sc = new StringCaculate();
sc.caculate("abc");
sc.caculate("abc");
sc.caculate("abc");

i,j,k没必要做成成员变量

[bobo364]

[Quote=引用 1 楼 kf156 的回复:]
LZ貌似没考虑到字符串除了可以有空格、字母、数字外，还能有符号或其他文字
[/Quote]

仅限于判断这3者

[bobo364]

[Quote=引用 2 楼 shine333 的回复:]
大哥，不知道你有没有测试过
Java codeStringCaculate sc=new StringCaculate();
sc.caculate("abc");
sc.caculate("abc");
sc.caculate("abc");
i,j,k没必要做成成员变量
[/Quote]

公司里没java，无法测试

[poikill]

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