请教一个小有关问题~

请教一个小问题~```
package   c06;
import   com.bruceeckel.simpletest.*;
import   java.util.*;

class   Shape   {
    Shape(int   i)   {
        System.out.println( "Shape   constructor ");
    }
    void   dispose()   {
        System.out.println( "Shape   dispose ");
    }
}

class   Circle   extends   Shape   {
    Circle(int   i)   {
        super(i);
        System.out.println( "Drawing   Circle ");
    }
    void   dispose()   {
        System.out.println( "Erasing   Circle ");
        super.dispose();
    }
}

class   Triangle   extends   Shape   {
    Triangle(int   i)   {
        super(i);
        System.out.println( "Drawing   Triangle ");
    }
    void   dispose()   {
        System.out.println( "Erasing   Triangle ");
        super.dispose();
    }
}

class   Line   extends   Shape   {
    private   int   start,   end;
    Line(int   start,   int   end)   {
        super(start);
        this.start   =   start;
        this.end   =   end;
        System.out.println( "Drawing   Line:   "+   start+   ",   "+   end);
    }
    void   dispose()   {
        System.out.println( "Erasing   Line:   "+   start+   ",   "+   end);
        super.dispose();
    }
}

public   class   CADSystem   extends   Shape   {
    private   static   Test   monitor   =   new   Test();
    private   Circle   c;
    private   Triangle   t;
    private   Line[]   lines   =   new   Line[5];
    public   CADSystem(int   i)   {
        super(i   +   1);
        for(int   j   =   0;   j   <   lines.length;   j++)
            lines[j]   =   new   Line(j,   j*j);
        c   =   new   Circle(1);
        t   =   new   Triangle(1);
        System.out.println( "Combined   constructor ");
    }
    public   void   dispose()   {
        System.out.println( "CADSystem.dispose() ");
        //   The   order   of   cleanup   is   the   reverse
        //   of   the   order   of   initialization
        t.dispose();
        c.dispose();
        for(int   i   =   lines.length   -   1;   i   > =   0;   i--)

            lines[i].dispose();
        super.dispose();
    }
    public   static   void   main(String[]   args)   {
        CADSystem   x   =   new   CADSystem(47);
        try   {
            //   Code   and   exception   handling...
        }   finally   {
            x.dispose();
        }
        monitor.expect(new   String[]   {
            "Shape   constructor ",
            "Shape   constructor ",
            "Drawing   Line:   0,   0 ",
            "Shape   constructor ",
            "Drawing   Line:   1,   1 ",
            "Shape   constructor ",
            "Drawing   Line:   2,   4 ",
            "Shape   constructor ",
            "Drawing   Line:   3,   9 ",
            "Shape   constructor ",
            "Drawing   Line:   4,   16 ",
            "Shape   constructor ",
            "Drawing   Circle ",
            "Shape   constructor ",
            "Drawing   Triangle ",
            "Combined   constructor ",
            "CADSystem.dispose() ",
            "Erasing   Triangle ",
            "Shape   dispose ",
            "Erasing   Circle ",
            "Shape   dispose ",
            "Erasing   Line:   4,   16 ",
            "Shape   dispose ",
            "Erasing   Line:   3,   9 ",
            "Shape   dispose ",
            "Erasing   Line:   2,   4 ",
            "Shape   dispose ",
            "Erasing   Line:   1,   1 ",
            "Shape   dispose ",
            "Erasing   Line:   0,   0 ",
            "Shape   dispose ",
            "Shape   dispose "
        });
    }
}   ///:~

这里的for(int   j   =   0;   j   <   lines.length;   j++)

            lines[j]   =   new   Line(j,   j*j);
怎么理解?

[解决办法]
什么怎么理解？
[解决办法]
就是创建了5个Line对象，放到了lines数组里。