Question

高分求解 JAVA高手们进

随机产生1000个大写字母，统计各字母出现的次数，并且按字母顺序打印出其出现次数
例如
A:50
B:34
...
高人们 你们八仙过海各显神通哈

答案都很完美 这让我很难办啊

该采纳哪个好啊

Answer 1

public class main{

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Random r = new Random();
r.StartToRun();
r.PrintOut();
}
}
class Random{
private int []letters;
public Random() {
letters = new int [26];
for(int i = 0; i < 26; i++){
letters[i] = 0;
}
}
public void StartToRun() {
for(int i = 0; i < 1000 ;i++) {
letters[(int)(Math.random()*26)]++;
}
}
public void PrintOut() {
int all = 0;
for(int i = 0; i < 26; i++) {
all += letters[i];
System.out.println((char)('A' + i) + " is :" + letters[i]);
}
System.out.println("all is " + all );
}
}

Answer 2

import java.util.Iterator;
import java.util.Map;
import java.util.Random;
import java.util.TreeMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class test {

public static void main(String[] args) {
char a;
String str = "";
Pattern p = null;
Matcher m = null;
int count = 0;
for (int i = 0; i < 1000; i++) {
a = (char) (Math.round(Math.random() * 25) + 65);
str += a + "";
}
System.out.println(str);

for ( char reg = 'A'; reg <= 'Z'; reg++) {
p = Pattern.compile(reg + "");
m = p.matcher(str);
while (m.find()) {
count++;
}

System.out.print(reg + ":" + count + " ");
count = 0;
}
}
}

Answer 3

import java.util.Random;

public class Alpha {
public static void main(String... args) {
Random rand = new Random();
int alpha[] = new int[26];
int t;
for (int i = 0; i < 1000; i++) {
t = rand.nextInt();
alpha[Math.abs(t) % 26]++;
}
for (int j = 0; j < alpha.length; j++) {
System.out.println((char) (j + 65) + ": " + alpha[j]);
}
}
}