Example usage for java.lang StringBuilder StringBuilder

Introduction

In this page you can find the example usage for java.lang StringBuilder StringBuilder.

Prototype

@HotSpotIntrinsicCandidate
public StringBuilder()

Source Link

Document

Constructs a string builder with no characters in it and an initial capacity of 16 characters.

Usage

From source file:Main.java

public static String makeCommaSepratedString(List<String> list, String delim) {
    StringBuilder sb = new StringBuilder();
    String loopDelim = "";
    for (String s : list) {
        sb.append(loopDelim);/*from   w w w .ja  v a 2 s  .co m*/
        sb.append(s);
        loopDelim = delim;
    }
    return sb.toString();
}

From source file:Main.java

public static String sanitizeToLineFeed(CharSequence string) {
    StringBuilder sb = new StringBuilder();
    for (int i = 0, len = string.length(); i < len; i++) {
        char c = string.charAt(i);
        boolean legal = c == '\u0009' || c == '\n' || (c >= '\u0020' && c <= '\uD7FF')
                || (c >= '\uE000' && c <= '\uFFFD');
        if (legal) {
            sb.append(c);/*from www  .j av a 2 s  .c o  m*/
        }
    }
    return sb.toString();
}

From source file:Main.java

public static String getQueryDateFormat(String datestr) {

    String[] substrings = datestr.split("/");

    return String.valueOf(new StringBuilder().append(substrings[2]).append("-").append(substrings[0])
            .append("-").append(substrings[1]));

}

From source file:Main.java

public static String NewCode() {
    StringBuilder sb = new StringBuilder();
    sb.append(random.nextInt(10));//from   ww w.ja  va2s  .  c om
    sb.append(random.nextInt(10));
    sb.append(random.nextInt(10));
    sb.append(random.nextInt(10));
    return sb.toString();
}

From source file:Main.java

public static String generateRandom() {
    Random number = new Random();
    StringBuilder message = new StringBuilder();
    for (int i = 0; i < 1405; i++) {
        message.append('a' + number.nextInt(52));
    }/*from   www  .ja  v  a  2  s. c o m*/
    return message.toString();
}

From source file:Main.java

public static String getStringByStringBuilder(String... strings) {
    StringBuilder builder = new StringBuilder();
    for (String string : strings) {
        builder.append(string);//from   w  w w.j a v  a  2 s  . c  o  m
    }
    return builder.toString();
}

From source file:Main.java

public static String changeImageParam(String url, String param) {
    if (url != null) {
        StringBuilder sb = new StringBuilder();
        if (url.contains("?")) {
            sb.append(url.substring(0, url.indexOf("?")));
        } else {/*from  w ww . j  a va  2 s. c om*/
            sb.append(url);
        }
        if (param != null) {
            sb.append(param);
        }
        return sb.toString();
    }
    return null;
}

From source file:Main.java

private static String toHex(byte[] results) {
    if (results == null)
        return null;
    StringBuilder hexString = new StringBuilder();
    for (int i = 0; i < results.length; i++) {
        int hi = (results[i] >> 4) & 0x0f;
        int lo = results[i] & 0x0f;
        hexString.append(Character.forDigit(hi, 16)).append(Character.forDigit(lo, 16));
    }//from  w w  w . ja  va  2 s. c  om
    return hexString.toString();
}

From source file:Main.java

public static String getOnlyNumerics(String str) {
    if (str == null)
        return null;
    StringBuilder strBuff = new StringBuilder();
    char c;/*w w  w. j  a  v a 2 s  .  co m*/
    for (int i = 0; i < str.length(); i++) {
        c = str.charAt(i);
        if (Character.isDigit(c))
            strBuff.append(c);
    }
    return strBuff.toString();
}

From source file:Main.java

public static String escapeJava(String doco) {
    if (doco == null)
        return "";

    StringBuilder b = new StringBuilder();
    for (char c : doco.toCharArray()) {
        if (c == '\r')
            b.append("\\r");
        else if (c == '\n')
            b.append("\\n");
        else if (c == '"')
            b.append("'");
        else/* w  w  w.  j a  va2  s.  c o  m*/
            b.append(c);
    }
    return b.toString();
}