1.1 GUI. JFrame. import java.awt.*; import javax.swing.*; public class XXX extends JFrame { public XXX() { // XXX. init() main() public static
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1 GUI ( ) GUI ( ) JFrame public class XXX extends JFrame { public XXX() { // XXX // init()... // ( )... init() main() public static public class XXX extends JFrame { public XXX() { // setsize(, ); // 1
2 // init()... // ( )... (new XXX()).setVisible(true); java XXX main() XXX ( ) setvisible()? main() main() System exit() ( ) import java.awt.event.*; public class SampleD1 extends JFrame { JScrollPane a1 = new JScrollPane(new JTextArea()); JButton b1 = new JButton("Quit"); public SampleD1() { setsize(400, 300); Container c = getcontentpane(); c.setlayout(null); c.add(a1); a1.setbounds(20, 20, 340, 200); c.add(b1); b1.setbounds(20, 240, 340, 40); b1.addactionlistener(new ActionListener() { public void actionperformed(actionevent evt) { System.exit(0); ); (new SampleD1()).setVisible(true); ( ) ( ) setlayout(null) Java (setlayout(null) 2
3 ) BorderLayout BorderLayout 1 North East Center West South 1: BorderLayout JTextArea import java.awt.event.*; public class SampleD2 extends JFrame { JScrollPane a1 = new JScrollPane(new JTextArea()); JButton b1 = new JButton("Quit"); public SampleD2() { Container c = getcontentpane(); c.add(a1); c.add(b1, BorderLayout.SOUTH); // c.add(new JButton("Button 1"), BorderLayout.NORTH); // c.add(new JButton("Button 2"), BorderLayout.EAST); // c.add(new JButton("Button 3"), BorderLayout.WEST); pack(); setsize(400, 300); b1.addactionlistener(new ActionListener() { ); public void actionperformed(actionevent evt) { System.exit(0); (new SampleD2()).setVisible(true); pack() ( ) BorderLayout JPanel JPanel 3
4 FlowLayout JPanel import java.awt.event.*; public class SampleD3 extends JFrame { JScrollPane a1 = new JScrollPane(new JTextArea()); JButton b1 = new JButton("Quit"); JPanel p1 = new JPanel(); public SampleD3() { Container c = getcontentpane(); c.add(a1); c.add(p1, BorderLayout.SOUTH); p1.setlayout(new FlowLayout()); p1.add(b1); p1.add(new JButton("Button 1")); p1.add(new JButton("Button 2")); p1.add(new JButton("Button 3")); pack(); setsize(400, 300); b1.addactionlistener(new ActionListener() { public void actionperformed(actionevent evt) { System.exit(0); ); (new SampleD3()).setVisible(true); ( ) 2 API JTabbedPane JSplitPane Swing 2.1 JTable JTree JTable Swing M N (2 ) 4
5 JTable TableModel 2: JTable TableModel ( 2) int getrowcount() int getcolumncount() String getcolumnname(i) i boolean iscelleditable(r,c) r c Object getvalueat(r,c) r c void setvalueat(object,r,c) r c MouseAdapter AbstractTableModel ( getrowcount() getcolumncount() getvalueat() 3 ) AbstractTableModel JTable import javax.swing.table.*; public class SampleD4 extends JFrame { public SampleD4() { getcontentpane().add(new JScrollPane(new JTable(new MyTableModel()))); pack(); setsize(400, 150); new SampleD4().setVisible(true); class MyTableModel extends AbstractTableModel { double[] rows = new double[]{1, 3, 5, 7, 11, 13, 17, 19, 23; double[] cols = new double[]{1, 2, 3, 4, 5, 6, 7, 8; public int getrowcount() { return rows.length; public int getcolumncount() { return cols.length; public boolean iscelleditable(int r, int c) { if(r == 0) return true; else return false; public Object getvalueat(int r, int c) { return new Double(rows[r] * cols[c]); 5
6 public void setvalueat(object o, int r, int c) { if(r == 0) { cols[c] = new Double(o.toString()).doubleValue(); firetabledatachanged(); JScrollPane JTable MyTableModel MyTableModel rows cols 2 getrowcount() getcolumcount() length 1 iscelleditable() 0 true rows[r] cols[c] getvalueat() Double 1 double cols[c] cols[c] AbstractTableModel firetabledatachanged() JTable ( repaint() ) ( ) ( 1/4 ) 1 ( ) Java implements implements 13-3 (a) (b) rows[0] 1 (c) ( cols[i] rows[i] ) (d) ( ) (e) (f) 2.2 DefaultTableModel 2 javax.swing.table 6
7 DefaultTableModel import javax.swing.table.*; public class SampleD5 extends JFrame { TableModel tab = new DefaultTableModel(9, 9); public SampleD5() { for(int i = 1; i < 10; ++i) { for(int j = 1; j < 10; ++j) tab.setvalueat(new Integer(i*j), i-1, j-1); getcontentpane().add(new JScrollPane(new JTable(tab))); pack(); setsize(400, 150); new SampleD5().setVisible(true); ( ) extends 3?? JFrame setjmenubar() JMenuBar JMenuBar add() JMenu JMenu add() JMenuItem addseparator() JMenuItem addactionlistener() JOptionPane showmessagedialog() ( ) import java.awt.event.*; public class SampleD6 extends JFrame { JMenuBar mbar = new JMenuBar(); JMenu menu0 = new JMenu("File"); JMenuItem item0 = new JMenuItem("Red"); JMenuItem item9 = new JMenuItem("Quit"); 7
8 JPanel panel = new JPanel(); public SampleD6() { menu0.add(item0); menu0.addseparator(); menu0.add(item9); mbar.add(menu0); setjmenubar(mbar); getcontentpane().add(panel); pack(); setsize(400, 300); item0.addactionlistener(new ActionListener() { public void actionperformed(actionevent e) { JOptionPane.showMessageDialog(SampleD6.this, "paint red."); panel.setbackground(color.red); ); item9.addactionlistener(new ActionListener() { public void actionperformed(actionevent e) { System.exit(0); ); (new SampleD6()).setVisible(true); (BorderLayout ) 1 JOptionPane showmessagedialog() 1 ( R12Sample1 ) this this R12Sample1.this API a. b. a. File ( : JMenu menu1 = new JMenu("Color"); mbar ) c. OK ( : JOptionPane ) d. JCheckBoxMenuItem / ( : getstate() ON OFF ) 8
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