South Mail Java Programming Experiment 1 integrated graphical interface programming

South Mail Java Programming Experiment 1 integrated graphical interface programming

Experimental Purpose:

Learn and understand the container, part, Layout manager, and part event handling methods in Java swing. Master the basic methods of programming Java GUI by writing and debugging the program.

Experimental content:

To design and write a program for converting renminbi into equivalent dollars, the interface requires that the amount of the renminbi be entered and the converted result can be obtained. (Buy RMB per $100 equivalent: 619.72)

Experiment Code:

Import java.awt.*;import java.awt.event.*;import java.math.*;import javax.swing.*;class Java1{public static void main (        String[] args) {/* Create Interface Settings tab, etc. */JFrame frame = new JFrame ("exchange rate conversion");        Container ct = Frame.getcontentpane ();        JPanel panel = new JPanel ();        Panel.setlayout (New FlowLayout ());        JLabel LABELRMB = new JLabel ("RMB");        Final JTextArea TEXTRMB = new JTextArea (1, 15);        JLabel Labeldol = new JLabel ("USD");        Final JTextArea Textdol = new JTextArea (1, 15);        JButton button = new JButton ("exchange rate conversion");        /* Set dollar out text box read-only property */textdol.setenabled (FALSE);        /* Add controls */Panel.add (LABELRMB);        Panel.add (TEXTRMB);        Panel.add (Labeldol);        Panel.add (Textdol);        Panel.add (button);        Ct.add (panel);        Frame.setvisible (TRUE);        Frame.setsize (200, 200); /* Set the Listener, press the button to convert the binary/button.addactionlistener (new ActionListener () {public void actionperformed (ACtionevent e) {String STRRMB = Textrmb.gettext ();                Double DRMB = double.parsedouble (STRRMB);                Double Ddol = DRMB * 100.00/619.72;                /* Keep two decimal places */BigDecimal B = new BigDecimal (Ddol);                Double dol = B.setscale (2, bigdecimal.round_half_up). Doublevalue ();                String Strdol = string.valueof (DOL);            Textdol.settext (Strdol);        }        });                /* Monitor Close Window event */Frame.addwindowlistener (new Windowadapter () {public void windowclosing (WindowEvent e) {            System.exit (0);    }        }); }}

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South Mail Java Programming Experiment 1 integrated graphical interface programming