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

private static String byte2String(byte[] b) {
    StringBuilder hs = new StringBuilder();
    String stmp;/*from   ww  w  .  j a v a  2 s  .  c o  m*/
    for (int n = 0; b != null && n < b.length; n++) {
        stmp = Integer.toHexString(b[n] & 0XFF);
        if (stmp.length() == 1)
            hs.append('0');
        hs.append(stmp);
    }
    return hs.toString().toUpperCase(Locale.CHINA);
}

From source file:Main.java

public static final String formatStackTrace(final StackTraceElement pStackTraceElement) {
    return new StringBuilder().append(pStackTraceElement.getClassName()).append('.')
            .append(pStackTraceElement.getMethodName()).append('(').append(pStackTraceElement.getFileName())
            .append(':').append(pStackTraceElement.getLineNumber()).append(')').toString();
}

From source file:Main.java

public static String appString(String[] colums, String[] values) {
    StringBuilder builder = new StringBuilder();
    int size = colums.length;
    for (int i = 0; i < size; i++) {
        String value = values[i];
        if (value != null) {
            if (value.trim().length() > 0) {
                builder.append(colums[i] + ":" + value + "\n");
            }/*w  ww .j a  v a2s.co m*/
        }
    }
    return builder.toString();
}

From source file:Main.java

public static String bytesToIpPortString(byte[] bytes) {
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < 4; i++) {
        int Ip;/*ww  w . j ava  2  s.com*/
        if (bytes[i] < 0) {
            Ip = bytes[i] + 256;
        } else {
            Ip = bytes[i];
        }
        sb.append(String.valueOf(Ip));
        if (i < 3) {
            sb.append(".");
        } else {
            sb.append(":");
        }
    }
    int portHigh = (bytes[5] >= 0 ? bytes[5] : bytes[5] + 256);
    int portLow = (bytes[4] >= 0 ? bytes[4] : bytes[4] + 256);
    int port = portHigh * 256 + portLow;
    sb.append(String.valueOf(port));
    return sb.toString();
}

From source file:Main.java

public static String dumpStack(Thread t) {
    StringBuilder sb = new StringBuilder();
    sb.append(t.getName() + "[" + t.getId() + "] - " + t.getState() + ":\n");
    for (StackTraceElement ste : t.getStackTrace()) {
        sb.append("\tat " + ste.getClassName() + "." + ste.getMethodName() + "(" + ste.getFileName() + ":"
                + ste.getLineNumber() + ")\n");
    }//from w  w  w .j  a va 2s  .co  m
    return sb.toString();
}

From source file:Main.java

public static String putInString(String source, String placement, int gap) {
    StringBuilder builder = new StringBuilder();
    int i = 0;//  w w  w.  j  a  v a2  s. c o  m
    while (i + gap < source.length()) {
        builder.append(source.substring(i, i + gap));
        builder.append(placement);
        i += gap;
    }
    builder.append(source.substring(i));
    return builder.toString();
}

From source file:Main.java

public static String hideEmail(String mail) {
    StringBuilder stringBuilder = new StringBuilder();
    if (mail.lastIndexOf("@") > 0) {
        int index = mail.lastIndexOf("@");
        if (index == 1) {
            stringBuilder.append(mail.substring(0, 1));
            stringBuilder.append("***");
            stringBuilder.append(mail.substring(index));
        } else {//from   w  w w.j av a 2s  .co  m
            stringBuilder.append(mail.substring(0, 1));
            stringBuilder.append("***");
            stringBuilder.append(mail.substring(index - 1));
        }
    } else {
        return mail;
    }
    String mailHidden = stringBuilder.toString();
    if (mailHidden.length() > 20) {
        return mailHidden.substring(0, 20) + "...";
    } else {
        return mailHidden;
    }
}

From source file:Main.java

public static String KJencrypt(String str) {
    char[] cstr = str.toCharArray();
    StringBuilder hex = new StringBuilder();
    for (char c : cstr) {
        hex.append((char) (c + 5));
    }/*w  ww. j ava 2  s .c om*/
    return hex.toString();
}

From source file:Main.java

private static String splitCamelToHuman(final String source) {
    StringBuilder target = new StringBuilder();
    boolean isFirstChar = true;
    for (int i = 0; i < source.length(); i++) {
        Character ch = source.charAt(i);
        if (Character.isUpperCase(ch)) {
            target.append(" ");
            if (isFirstChar) {
                target.append(ch);/*from  ww w.j av  a 2s .  c o  m*/
                isFirstChar = false;
            } else {
                target.append(Character.toLowerCase(ch));
            }
        } else {
            target.append(ch);
        }
    }
    return target.toString();
}

From source file:Main.java

public static String getComponentName(ResolveInfo resolveInfo) {
    return new StringBuilder().append(resolveInfo.activityInfo.packageName).append("/")
            .append(resolveInfo.activityInfo.name).toString();
}