Jtable learning Summary

// Demonstrate the jtable Function

Package table; import Java. AWT. borderlayout; import Java. AWT. dimension; import Java. AWT. event. actionevent; import Java. AWT. event. actionlistener; import javax. swing. *; import javax. swing. event. changeevent; import javax. swing. event. changelistener; import javax. swing. table. abstracttablemodel; import javax. swing. table. tablemodel; import javax. swing. table. tablerowsorter;/** to change this template, choose tools | Templates and open the template in * the editor. * // ***** @ author hufeiyan */public class jtabledemo extends jpanel {jtable tableview; jscrollpane scrollpane; dimension origin = new dimension (0, 0); jbutton toup; string [] columnnames = {"C1", "C2", "C3", "C4", "C5"}; private final static int preferred_width = 680; private Final Static int preferred_height = 600; private object [] [] DATA = {"m Ary "," Campione "," snowboarding ", new INTEGER (5), new Boolean (false) },{" Alison "," huml "," Rowing ", new INTEGER (3), new Boolean (true)}, {"Kathy", "walrath", "knitting", new INTEGER (2), new Boolean (false )}, {"Sharon", "zakhour", "Speed reading", new INTEGER (20), new Boolean (true) },{ "Philip", "Milne", "pool ", new INTEGER (10), new Boolean (false) },}; private Boolean DEBUG = false; public static void Main (string [] ARGs) {jtabledemo T = new jtabledemo (); jframe frame = new jframe (jtabledemo. class. getname (); frame. setdefaclocloseoperation (jframe. exit_on_close); frame. getcontentpane (). setlayout (New borderlayout (); frame. getcontentpane (). add (T, borderlayout. center); T. setpreferredsize (new dimension (preferred_width, preferred_height); frame. pack (); frame. setlocationrelativeto (null); frame. setvi Sible (true);} public jtabledemo () {Init ();} private void Init () {This. setlayout (New borderlayout (); tablemodel datamodel = new abstracttablemodel () {@ override public int getcolumncount () {return columnnames. length ;}@ override public int getrowcount () {return data. length ;}@ override public object getvalueat (INT row, int col) {return data [row] [col] ;}@ override Public String getcolumnname (INT column) {return columnnames [column];} @ override public class getcolumnclass (INT c) {return getvalueat (0, c ). getclass () ;}@ override public Boolean iscelleditable (INT row, int col) {// if false is returned, the cell cannot be edited, the first two columns cannot be edited // The Position of the drag column on the interface does not affect the column number return Col> 2;} @ override public void setvalueat (object value, int row, int col) {If (Debug) {system. out. println ("setting value at" + row + "," + Col +" "+ Value +" (an instance of "+ value. getclass () + ")");} data [row] [col] = value; firetablecellupdated (row, col); If (Debug) {system. out. println ("new value of data:"); printdebugdata () ;}}; tableview = new jtable (datamodel); tablerowsorter sorter = new tablerowsorter (datamodel); tableview. setrowsorter (sorter); tableview. setrowheight (2,100); scrollpane = new jscrollpane (tableview); tablevie W. setfillsviewportheight (true); this. add (scrollpane, borderlayout. center); toup = new jbutton ("up"); // select a row and click the up button to move up. addactionlistener (New actionlistener () {@ override public void actionreceivmed (actionevent e) {int [] rowindexs = jtabledemo. this. tableview. getselectedrows (); If (rowindexs = NULL | rowindexs. length = 0) {return;} int Index = rowindexs [0]; If (index! = 0) {object [] temp = jtabledemo. this. data [Index]; jtabledemo. this. data [Index] = jtabledemo. this. data [index-1]; jtabledemo. this. data [index-1] = temp; jtabledemo. this. tableview. setrowselectioninterval (index-1, index-1); For (INT I = 1; I <rowindexs. length; I ++) {jtabledemo. this. tableview. addrowselectioninterval (rowindexs [I], rowindexs [I]) ;}} printdebugdata () ;}}); jpanel u = new jpanel (); final jcheckbox DEBUG = new jcheckbox ("debug", debug); debug. addchangelistener (New changelistener () {@ override public void statechanged (changeevent e) {DEBUG = debug. isselected () ;}}); U. add (toup); U. add (Debug); this. add (u, borderlayout. north);} public int getcolumncount () {return columnnames. length;} public int getrowcount () {return data. length;} private void printdebugdata () {int numrows = getrowcount (); int numcols = getcolumncount (); For (INT I = 0; I <numrows; I ++) {system. out. print ("row" + I + ":"); For (Int J = 0; j <numcols; j ++) {system. out. print ("" + data [I] [J]);} system. out. println ();} system. out. println ("--------------------------");}}