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 final String toHexString(byte[] bytes) {
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < bytes.length; i++) {
        String hex = Integer.toHexString(bytes[i] & 0xFF);
        if (hex.length() == 1) {
            hex = '0' + hex;
        }/*from  ww  w.j  a va2 s.co m*/
        sb.append(hex);
    }
    return sb.toString();
}

From source file:Main.java

public static String generateConnectKey(String host, int port) {
    StringBuilder sb = new StringBuilder();
    sb.append(host);//from  w  w  w  .  j  av a  2s  .co m
    sb.append(":");
    sb.append(String.valueOf(port));
    return sb.toString();
}

From source file:Main.java

public static String addStrings(Object... params) {
    StringBuilder stringBuilder = new StringBuilder();
    for (Object s : params) {
        stringBuilder.append(s);//from w w  w  .  j a v  a 2 s .c  om
    }
    return stringBuilder.toString();

}

From source file:Main.java

public static String hexEncode(byte[] aInput) {
    StringBuilder result = new StringBuilder();

    char[] digits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };

    for (int idx = 0; idx < aInput.length; ++idx) {
        byte b = aInput[idx];

        result.append(digits[(b & 0xf0) >> 4]);
        result.append(digits[b & 0x0f]);
    }/* ww  w  .  j  a v a 2s  .  c  o  m*/

    return result.toString();
}

From source file:Main.java

public static String getThemeAlphaColor(int alpha) {
    StringBuilder stringBuilder = new StringBuilder();
    stringBuilder.append("#");
    stringBuilder.append(String.format("%02x", alpha * 255 / 100));
    stringBuilder.append("12B7F5");

    return stringBuilder.toString();
}

From source file:Main.java

public static String toStringWithComma(String[] array) {
    StringBuilder sb = new StringBuilder();
    if (array != null) {
        for (int i = 0; i < array.length; i++) {
            sb.append(array[i]);/*w ww  .j a  v  a 2 s.  c o m*/
            if (i < array.length - 1)
                sb.append(",");
        }
    }
    return sb.toString();
}

From source file:Main.java

public static String getClassFullName(String pkg, String name) {
    StringBuilder sb = new StringBuilder();
    if (pkg.length() != 0) {
        sb.append(pkg).append(".");
    }//  ww w.  j a  v a 2  s .  c  o m
    sb.append(name);
    return sb.toString();
}

From source file:Main.java

public static String convert(String utfString) {
    StringBuilder sb = new StringBuilder();
    int i = -1;/*  w w  w .  ja  va2 s . c om*/
    int pos = 0;

    while ((i = utfString.indexOf("\\u", pos)) != -1) {
        sb.append(utfString.substring(pos, i));
        if (i + 5 < utfString.length()) {
            pos = i + 6;
            sb.append((char) Integer.parseInt(utfString.substring(i + 2, i + 6), 16));
        }
    }

    return sb.toString();
}

From source file:Main.java

public static String implode(Iterable it, String glue) {
    StringBuilder result = new StringBuilder();
    for (Object o : it) {
        result.append(glue).append(o);// ww w.  j  a va2s .  c o m
    }
    if (result.length() > 0) {
        result.delete(0, glue.length());
    }
    return result.toString();
}

From source file:Main.java

public static String convertArrayToString(String[] array) {
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < array.length; i++) {
        sb.append(array[i]);//from w w w.ja va 2s . c o m
        // Do not append comma at the end of last element
        if (i < array.length - 1) {
            sb.append("-");
        }
    }
    return sb.toString();
}