Which is the best way to append single quotes for a String in java

Question

For example,

String x= "ABC";

Which is the best way to convert ABC to 'ABC' ?

Solution 1

You can use String inner StringBuilder like

sb.append(String.format("'%s'", variable));

Solution 2

This will create less intermediate String objects than with +

public static String quote(String s) {
    return new StringBuilder()
        .append('\'')
        .append(s)
        .append('\'')
        .toString();
}

public static void main(String[] args) {
    String x = "ABC";
    String quotedX = quote(x);
    System.out.println(quotedX);
}

prints 'ABC'

Solution 3

The other option is the escape character, which in Java is the backslash (). So: String x = "\'ABC\'";

Here is a good reference.