Inline declarations

I was studying and trying to break down the code below, when I realized the code had some strange inline declarations.
The new Object and new String are simple enough to figure out, but what I don't understand is the section of code that comes after that.

1.  Why is there a set of {} for this section of code?
2.  What is [public Class getColumnClass] doing in the code?
3.  What is [Class[] types] doing in the code?
4.  Is this section of code declaring some type of inline class, and if so, can someone give me a link for a good tutorial on this?

        jTable1.setModel(
                            new javax.swing.table.DefaultTableModel
                            (
                                new Object [][] {
                                    {"11:00", "C++", new Integer(50), "1111111111111111111111111111"},
                                    {"1111", "1111", new Integer(111), "11111"},
                                    {"222", "22", new Integer(222), "22222222222222222222"},
                                    {"333", "333", new Integer(33), "3333333333333333333333"},
                                    {"44", "44", new Integer(4), "4"},
                                    {"5", "5", new Integer(5), "5"},
                                    {"6", "6", new Integer(6), "6"}
                                },
                                new String [] {"Time", "Topic Area", "Points", "Title"}
                            )
                            { //What is this *****************************************************
                                Class[] types = new Class [] {java.lang.String.class, java.lang.String.class, java.lang.Integer.class, java.lang.String.class};
                                public Class getColumnClass(int columnIndex) {return types [columnIndex];}
                            }//**************************************************************
                        );