[英]Splitting of String on encountering '-' between characters but not on numbers
[英]Splitting a String by the numbers in between
我試圖在數字拆分字符串。 例如,如果我有
字符串x = 2A2B;
我希望能夠將字符串拆分為多個部分,然后在屏幕上打印出“ AABB”。 有人可以幫我嗎?
下面的代碼段可能會幫助您
String str = "3A2B";
// split the string on
String st[] = str.split("(?<=\\D)(?=\\d)");
System.out.println(Arrays.toString(st));
for (String s : st) {
String intValue = s.substring(0, s.length()-1);
int i = Integer.parseInt(intValue);
char c = s.charAt(s.length()-1);
while (i > 0) {
System.out.print(c);
i--;
}
System.out.println();
}
嘗試使用java.util.Scanner
Scanner.nextInt()
Scanner.next()
他們將幫助您完成任務。
它可以滿足您的基本目的:
String x = "2A2B";
int times = 0;
for(char ch:x.toCharArray()){
if(Character.isDigit(ch)){
times = times*10+(Integer.valueOf(String.valueOf(ch)));
}else{
do{
System.out.print(ch);
times--;
}while(times > 0);
times = 0;
}
}
我建議為此使用掃描儀+分隔符。
Scanner s = new Scanner(input).useDelimiter("\d");
將讀取字符串,並用數字(\\ d)分割,然后next()應該首先給出“ A”,然后給出“ B”
Scanner s = new Scanner(input).useDelimiter("\D");
將讀取字符串,除以非數字的任何內容,next()應該返回“ 2”,然后返回“ 2”
像這樣的東西? (假設總有一個數字后跟一個字母)
String rawSequence = "2U2D1L1R1L1R1B1A";
string newSequence = "";
Scanner scanLetters = new Scanner(rawSequence);
scanLetters.useDelimiter("\d");
Scanner scanNumbers = new Scanner(rawSequence);
scanLetter.useDelimeter("\D");
String[] letters = new String[ rawSequence.length()/2 ];
int[] amounts = new int[ rawSequence.length()/2 ];
for (int x = 0; x < rawSequence.length(); x++){
letters[x] = scanLetters.next()
numbers[x] = scanNumbers.next()
}
for (int i = 0, i < amounts.length, i++){
for (int j = 0; j < amounts[i], j++){
newSequence.concat(letters[i]);
}
}
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