About cell color settings in jtable

Today, I wrote an article about jtable, including setting the font color for jtable cells, setting the background color for jtable cells, and making it impossible to edit a column in jtable. The code is very simple. For more information, see:

PackageJava;

ImportJavax. Swing. jframe;

ImportJavax. Swing. jtable;

ImportJavax. Swing. jpanel;

ImportJavax. Swing. jscrollpane;

ImportJava. AWT. borderlayout;

ImportJavax. Swing. jcombobox;

ImportJavax. Swing. Table. tablecolumn;

ImportJavax. Swing. defaultcelleditor;

ImportJavax. Swing. Table. defaulttablecellrenderer;

ImportJava. AWT. color;

ImportJavax. Swing. Table. defaulttablemodel;

/**

* Set the cell to uneditable.

*/

Public ClassJtableframe_4ExtendsJframe {

 

PrivateJpanel;

PrivateJtable table; // defines two-dimensional data tables.

PrivateJscrollpane scrollpane; // defines a panel with a scroll bar

 PrivateDefaulttablemodel DTM; // defines a table model that can store data.

 

// Initialize data

Object [] [] rowdata = {

{"1001", "Li han", "software department ",NewDouble (3000 )},

{"1002", "Zhu ze", "software department ",NewDouble (3100 )},

{"1003", "Liu Yu", "manager department ",NewDouble (3000 )},

{"1004", "Zhang Bin", "software department ",NewDouble (4000 )},

{"1005", "Qin Xiao", "Personnel Department ",NewDouble (1, 4000 )}

};

// Initialize the column name

Object [] columnnames = {"no.", "name", "department", "monthly salary "};

PublicJtableframe_4 (){

Super("Cells with drop-down lists ");

Init ();

}

Public VoidInit (){

Setsize (500,300 );

Setdefaclocloseoperation (jframe. exit_on_close );

// Use tablemodel to re-overwrite iscelleditable and change the first column to uneditable.

DTM =NewDefaulttablemodel (rowdata, columnnames ){

Public BooleanIscelleditable (IntRowindex,IntColumnindex ){

BooleanF = (0 <= rowindex & rowindex <getrowcount () & columnindex = 0 )?False:True;

ReturnF;

}

};

Table =NewJtable (DTM );

Jcombobox ComboBox =NewJcombobox ();

ComboBox. additem ("software Department ");

ComboBox. additem ("manager ");

ComboBox. additem ("Personnel Department ");

ComboBox. additem ("Logistics Department ");

ComboBox. additem ("Finance Department ");

// Tablecolumn is used to edit attributes of a column in a table.

Tablecolumn = table. getcolumn ("Department ");

// Use the setcelleditor () method in the tablecolumn class to set the cell Editor

// The defaultcelleditor class can set cells in the table as drop-down boxes.

Tablecolumn. setcelleditor (NewDefaultcelleditor (ComboBox ));

// Defaulttablecellrenderer class can draw cell background, font color, and other functions

Defaulttablecellrenderer backgroundcolor =NewDefaulttablecellrenderer ();

// The background of the department column is yellow.

Backgroundcolor. setbackground (color. Yellow );

Tablecolumn. setcellrenderer (backgroundcolor );

Tablecolumn moneycolumn = table. getcolumn ("monthly salary ");

// Draw the font color of the monthly salary Column

Defaulttablecellrenderer fontcolor =NewDefaulttablecellrenderer (){

Public VoidSetvalue (object Value) {// rewrite the setvalue method to dynamically set the font color of the column unit.

DoubleA = (ValueInstanceofDouble )? (Double) value). doublevalue (): 0.0; // obtain the value in the monthly salary Column

Setforeground (A> 3099.0 )? Color. RED: color. Black); // if the monthly salary is greater than 3099 yuan, set the font to red.

Settext (value =Null)? "": Value. tostring ());

}

};

Moneycolumn. setcellrenderer (fontcolor );

Panel =NewJpanel ();

Panel. setlayout (NewBorderlayout ());

Scrollpane =NewJscrollpane ();

Scrollpane. getviewport (). setview (table); // place the two-dimensional data table in the scroll panel.

Panel. Add (scrollpane, borderlayout. center); // Add the scroll panel to the bottom panel.

This. Getcontentpane (). Add (panel, borderlayout. center );

Setvisible (True);

}

Public Static VoidMain (string [] ARGs ){

Jtableframe_4 F =NewJtableframe_4 ();

}

}