æ°ç»ä¸æåç¸åçåæ¯ï¼å¯ä»¥ä½¿ç¨stringçcharatæ¹æ³éååæ¯ï¼æ¾å°ä¸ä¸ªstringä¸ï¼æ¾å°ä¹åå é¤æè¿ä¸ªåæ¯ï¼æ¥çéåä¸ä¸ä¸ªï¼ç¤ºä¾å¦ä¸ï¼
package test1;
import java.util.Random;
public class ArrayTest {
public static void main(String[] args) {
//1ãæ建ä¸ä¸ªæ°ç»
String[] array={"a","b","c","d","c","d","e"};
//2ãå°æ°ç»ä¸å¼çéåæä¸ä¸ªString
String str="";
for(int i=0;i<array.length;i++){
str+=array[i];
}
System.out.println("strlength="+str);//æå°åºstr
//3ã为äºè½å¤å®ç°éæ±ï¼æ建ä¸ä¸ªStringBuffer,æ¹ä¾¿ä½¿ç¨ï¼ç¨æ³å¯ä»¥å¨jdk apiæ¾æ¥æ¾
StringBuffer sbu=new StringBuffer(str);//ç¨stræ建ä¸ä¸ªStringBuffer
String flag[][]=new String[sbu.length()][2];//è¿éåªæ¯å®ä¸ä¸ªåºå®é¿çäºç»´æ°ç»ï¼ç¨æ¥åæ¾éåå°å¾åæ¯å åºç°ç次æ°ï¼æ¯å¦ï¼a,1ï¼è¡¨ç¤ºaåºç°äº1次ï¼åªæå¨æ¯ä¸ªåæ¯é½ä¸éå¤ä¸æè½è£
满
for(int j=0;j<sbu.length();j++){
flag[j][0]=sbu.charAt(j)+"";//äºç»´æ°å第ä¸åæ¾åæ¯
flag[j][1]=1+"";////äºç»´æ°å第äºåæ¾åºç°æ¬¡æ°ï¼è³å°ä¼åºç°ä¸æ¬¡
for(int k=j+1;k<sbu.length();k++){
if(sbu.charAt(j)==sbu.charAt(k)){
sbu.deleteCharAt(k);//æ¾å°ç¸åçåæ¯ï¼ä»StringBufferä¸å é¤ï¼è¿æ ·ä¸æ¬¡å°±ä¸ä¼éåå®
flag[j][1]=Integer.parseInt(flag[j][1])+1+"";//é¿åº¦å 1
}
}
}
String a="{";
for(int i=0;i<flag.length;i++){
if(flag[i][1]!=null){//ä¸é¢è¯´çflagäºç»´ä¸ä¸å®æ¹é¢ï¼æ以å¤æä¸ä¸ååå¼
String s=flag[i][0];//åºç°çåæ¯
int num=Integer.parseInt(flag[i][1]);//åºç°ç次æ°
System.out.println("åæ¯:"+s+"åºç°äº:"+num+"次");
int j=0;
for( j=0;j<num;j++){
a+=s;
}
if(j+1==num){
a+="}";
}else{
a+="}{";
}
}
}
System.out.println("ç»ææ¯:"+a);
}
//说æä¸ä¸ï¼å¯ä»¥æ ¹æ®ä½ èªå·±çéè¦è£
}