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 <T> String join(Iterable<T> collection, String conjunction) {
    StringBuilder sb = new StringBuilder();
    boolean isFirst = true;
    for (T item : collection) {
        if (isFirst) {
            isFirst = false;//  www. j  a  v  a2s  . c  o  m
        } else {
            sb.append(conjunction);
        }
        sb.append(item);
    }
    return sb.toString();
}

From source file:Main.java

public final static <K, V> String keyJoin(Map<K, V> map, String separator) {
    StringBuilder sb = new StringBuilder();
    for (Map.Entry<K, V> entry : map.entrySet()) {
        sb.append(String.valueOf(entry.getKey())).append(separator);
    }//  w  w  w .j  a  va2  s  . co m
    return sb.toString().substring(0, sb.toString().length() - separator.length());
}

From source file:Main.java

private static String bytesToHexString(byte[] bytes) {
    StringBuilder sb = new StringBuilder();
    for (byte aByte : bytes) {
        String hex = Integer.toHexString(255 & aByte);
        if (hex.length() == 1) {
            sb.append('0');
        }/*from   ww w.j a v  a 2 s .co  m*/
        sb.append(hex);
    }
    return sb.toString();
}

From source file:Main.java

public static <T> String listToSqlString(List<T> list) {
    StringBuilder builder = new StringBuilder();
    boolean firstCheck = true;
    for (T s : list) {
        if (firstCheck) {
            builder.append("'" + s + "'");
            firstCheck = false;//from  www.jav a 2s.c om
        } else {
            builder.append(",");
            builder.append("'" + s + "'");
        }
    }
    return builder.toString();
}

From source file:Main.java

public static String makeStrs(char ch, int len) {
    StringBuilder stringBuilder = new StringBuilder();
    for (int i = 0; i < len; ++i) {
        stringBuilder.append(ch);//w w  w .  j av  a 2  s  .  co m
    }

    return stringBuilder.toString();
}

From source file:Main.java

static public String join(List<String> list, String conjunction) {
    StringBuilder sb = new StringBuilder();
    boolean first = true;
    for (String item : list) {
        if (first)
            first = false;/*from ww  w .j  av a  2s  .  c o m*/
        else
            sb.append(conjunction);
        sb.append(item);
    }
    return sb.toString();
}

From source file:Main.java

public static String generateMultiContentType(final String boundary, final String charset) {
    StringBuilder buffer = new StringBuilder();
    buffer.append("multipart/form-data; boundary=");
    buffer.append(boundary);//from w  ww . j  a v a  2 s.co m
    if (charset != null) {
        buffer.append("; charset=");
        buffer.append(charset);
    }
    return buffer.toString();
}

From source file:Main.java

public static String join(List<String> values, String string) {

    StringBuilder sb = new StringBuilder();
    int c = values.size();
    for (String val : values) {
        if (c-- > 1)
            sb.append(val + string);
        else/*from  w  w  w .j  a  v a 2 s.  c  o  m*/
            sb.append(val);

    }
    return sb.toString();
}

From source file:Main.java

public static String asHtmlBr(String prefix, List<String> strings) {
    StringBuilder s = new StringBuilder();
    boolean first = true;
    for (String n : strings) {
        if (!first)
            s.append("<br/>");
        s.append(prefix);//ww w  . j ava2s.com
        s.append(n);
        first = false;
    }
    return s.toString();
}

From source file:Main.java

public static String join(Collection<String> c, String sep) {
    StringBuilder sb = new StringBuilder();
    boolean seenFirst = false;
    for (String e : c) {
        if (seenFirst) {
            sb.append(sep);/*from   ww  w.  j ava  2s  . c o m*/
        } else {
            seenFirst = true;
        }
        sb.append(e);
    }
    return sb.toString();
}