Commons Lang、StandardToStringStyle#setFieldSeparator

import org.apache.commons.lang.builder.StandardToStringStyle;

public class C2009080300 {
    public static void main(String[] args) {
        StandardToStringStyle x = new StandardToStringStyle();
        System.out.println(x.getFieldSeparator());

        x.setFieldSeparator(":");
        System.out.println(x.getFieldSeparator());
    }
}

で、

,
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