String s = "adfasdfaaadddaaddeeedddeeeffg"; //要统计的字符 char comp = 'a'; char current = ' '; int count = 0; char[] chars = s.toCharArray(); for(int i = 0; i < chars.length; i++) { if(current != chars[i]) { current = chars[i]; if(comp == current) { count++; } } } System.out.println(count); 要统计的字符重复时不统计。
public static void main(String[] args) { String temp="df2dd34ffpnfdwfelwtr"; String rex = "f"; Pattern p = Pattern.compile(rex); Matcher m = p.matcher(temp); int count=0; int startindex=temp.length()+1; while (m.find()) { if(startindex+1!=m.start()){ count++; System.out.println("得到的"+m.group()+"起始标"+m.start()); } startindex= m.start(); } }
package com.test;public class Demo { public static void main(String[] args) {
//要统计的字符
char comp = 'a';
char current = ' ';
int count = 0;
char[] chars = s.toCharArray();
for(int i = 0; i < chars.length; i++)
{
if(current != chars[i])
{
current = chars[i];
if(comp == current)
{
count++;
}
}
}
System.out.println(count);
要统计的字符重复时不统计。
public static void main(String[] args) {
String temp="df2dd34ffpnfdwfelwtr";
String rex = "f";
Pattern p = Pattern.compile(rex);
Matcher m = p.matcher(temp);
int count=0;
int startindex=temp.length()+1;
while (m.find()) {
if(startindex+1!=m.start()){
count++;
System.out.println("得到的"+m.group()+"起始标"+m.start());
}
startindex= m.start();
}
}
public static void main(String[] args) {
Demo ks=new Demo("hell,ccsdn.com!",'c'); }
private String str;
private char c;
private int Num=0;
public Demo(String strs,char cs)
{
this.str=strs;
this.c=cs;
for(int i=0;i<str.length();i++)
{
if(str.charAt(i)==c)
{
if(str.charAt(i)!=str.charAt(i-1))
{
Num++;
}
}
}
System.out.println(Num);
}
}
public static void main(String[] args) {
Demo ks=new Demo("hell,ccsdn.com!",'c'); }
private String str;
private char c;
private int Num=0;
public Demo(String strs,char cs)
{
this.str=strs;
this.c=cs;
for(int i=0;i<str.length();i++)
{
if(str.charAt(i)==c)
{
if(str.charAt(i)!=str.charAt(i-1))
{
Num++;
}
}
}
System.out.println(Num);
}
}
{
String str = "sdafasddfaaadddaaddeeedd";
Map<String,Integer> maps = new HashMap<String,Integer>();
char up = ' ';
for(int i=0;i<str.length();i++)
{
char achar = str.charAt(i);
if(up==achar)
{
Integer value = maps.get(achar+"");
maps.put(achar+"",value==null?1:value+1);
}
up = achar;
}
System.out.println(maps);
}
int i = 0;
while (m.find()) {
i++;
}
System.out.println(i);