图形用户界面设计表格组件示例

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1、程序运行结果截图：程序清单如下：importjavax.swing.*;importjava.awt.*;importjava.awt.event.*;publicclassExample10_16{publicstaticvoidmain(Stringarts[]){Winwin=newWin();}}classWinextendsJFrameimplementsActionListener{JTabletable;Objecta[][];Objectname[]={"商品名称","单价","销售量","销售额"};JButtoncomputerRows,computerColums;J

2、TextFieldinputRowsNumber;intinitRows=1;JPanelpSouth,pNorth;intcount=0,rowsNumber=0;Win(){computerRows=newJButton("每件商品销售额");computerColums=newJButton("总销售额");inputRowsNumber=newJTextField(10);computerRows.addActionListener(this);computerColums.addActionListener(this);inputRowsNumber.addActionListe

3、ner(this);pSouth=newJPanel();pNorth=newJPanel();pNorth.add(newJLabel("输入表格行数，回车确认"));pNorth.add(inputRowsNumber);pSouth.add(computerRows);pSouth.add(computerColums);add(pSouth,BorderLayout.SOUTH);add(pNorth,BorderLayout.NORTH);add(newJScrollPane(table),BorderLayout.CENTER);setBounds(100,100,370,25

4、0);setVisible(true);setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);}publicvoidactionPerformed(ActionEvente){if(e.getSource()==inputRowsNumber){count=0;initRows=Integer.parseInt(inputRowsNumber.getText());a=newObject[initRows][4];for(inti=0;i

5、Table(a,name);table.setRowHeight(20);getContentPane().removeAll();add(newJScrollPane(table),BorderLayout.CENTER);add(pSouth,BorderLayout.SOUTH);add(pNorth,BorderLayout.NORTH);validate();}elseif(e.getSource()==computerRows){introws=table.getRowCount();//获取现有表格行数for(inti=0;i

6、oleanboo=true;for(intj=1;j<=2;j++){try{sum=sum*Double.parseDouble(a[i][j].toString());}catch(Exceptionee){boo=false;table.repaint();//表格更新显示}if(boo==true){a[i][3]=""+sum;//修改数组中的数据table.repaint();}}}}elseif(e.getSource()==computerColums){if(count==0){rowsNumber=table.getRowCount();//获取表格的目前的行数coun

7、t++;}else{rowsNumber=table.getRowCount();//获取表格的目前的行数rowsNumber=rowsNumber-1;//不要最后一行}doubletotalSum=0;for(intj=0;j