Java Object to String objectToString(Object x)

Description

object To String

License

Creative Commons License

Declaration

private static String objectToString(Object x) 

Method Source Code

//package com.java2s;

public class Main {
    private static String objectToString(Object x) {
        // Extreme compatibility with StringBuilder.append(null)
        String s;//  ww  w  .j  a  va 2s  . c o  m
        return (x == null || (s = x.toString()) == null) ? "null" : s;
    }

    /**
     * Like Arrays.toString(), but caller guarantees that size > 0,
     * each element with index 0 <= i < size is a non-null String,
     * and charLength is the sum of the lengths of the input Strings.
     */
    static String toString(Object[] a, int size, int charLength) {
        // assert a != null;
        // assert size > 0;

        // Copy each string into a perfectly sized char[]
        // Length of [ , , , ] == 2 * size
        final char[] chars = new char[charLength + 2 * size];
        chars[0] = '[';
        int j = 1;
        for (int i = 0; i < size; i++) {
            if (i > 0) {
                chars[j++] = ',';
                chars[j++] = ' ';
            }
            String s = (String) a[i];
            int len = s.length();
            s.getChars(0, len, chars, j);
            j += len;
        }
        chars[j] = ']';
        // assert j == chars.length - 1;
        return new String(chars);
    }
}

Related

1. objectToString(Object obj, String defaultvalue)
2. objectToString(Object object)
3. objectToString(Object object, String defaultValue)
4. objectToString(Object objectStr)
5. ObjectToString(Object x)
6. objectToString(Object[] obj)
7. objectToStringNoNull(Object obj)
8. objToString(Object obj)
9. objToString(Object obj)