Method format

output/java_guava/1.4.13/Preconditions.java:1350–1379

(String template, @Nullable Object... args)

  // Note that this is somewhat-improperly used from Verify.java as well.

    static String format(String template, @Nullable Object... args) {
    template = String.valueOf(template); // null -> "null"

    // start substituting the arguments into the '%s' placeholders
    StringBuilder builder = new StringBuilder(template.length() + 16 * args.length);
    int templateStart = 0;
    int i = 0;
    while (i < args.length) {
        int placeholderStart = template.indexOf("%s", templateStart);
        if (placeholderStart == -1) {
        break;
        }
        builder.append(template, templateStart, placeholderStart);
        builder.append(args[i++]);
        templateStart = placeholderStart + 2;
    }
    builder.append(template, templateStart, template.length());

    // if we run out of placeholders, append the extra args in square braces
    if (i < args.length) {
               builder.append(" [");
               builder.append(args[i++]);
               while (i < args.length) {
                                                                        builder.append(", ");
                                                                        builder.append(args[i++]);
               }
               builder.append(']');
    }
    return builder.toString();
    }
}