Sample

public class StringBuilderTest {
    StringBuilder StringBuilderShow() {
        StringBuilder dialogStr = new StringBuilder();
        StringBuilderTest talClazz = new StringBuilderTest();
        dialogStr.append((new StringBuilder("Table: ")).append(talClazz.getClass().getName()).append("\n"));
        return dialogStr;
    }

    public static void main(String args[]) {
        StringBuilderTest test = new StringBuilderTest();
   StringBuilder str=test.StringBuilderShow();
   str.append("\r\n\t abishkar");
        System.out.println(str);
    }

}

public class StringImp {
    public static void main(String[] args){
       
    String d=new StringBuilder(String.valueOf("abc")).append(":").append("def").append(":").append("ijk").toString();
    System.out.println(d);

}
}