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該計算器將有一個簡單的界面.2操作數X和Y以及無法編輯的結果。有4個按鈕+， - ，*，/。一旦按鈕被點擊，結果出現在結果欄中。每次點擊一個按鈕時，整個公式將顯示在下表中。因此，如果有10個操作完成後，所有表達式都應顯示在下面，例如3 + 2 = 5,5-3 = 2etc。這是個問題，到目前爲止我已經完成了這個任務。圖形用戶界面計算器應用程序
import java.util.ArrayList;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.custom.SashForm;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
public class Calculator {
protected Shell shell;
/**
* Launch the application.
* @param args
*/
public static void main(String[] args) {
try {
Calculator window = new Calculator();
window.open();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* Open the window.
*/
public void open() {
Display display = Display.getDefault();
createContents();
shell.open();
shell.layout();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
}
/**
* Create contents of the window.
*/
protected void createContents() {
shell = new Shell();
shell.setMinimumSize(new Point(150, 39));
shell.setSize(450, 300);
shell.setText("Calculator");
shell.setLayout(null);
Text xTextBox = new Text(shell, SWT.BORDER);
xTextBox.setText(" ");
xTextBox.setBounds(37, 10, 76, 21);
Text yTextBox = new Text(shell, SWT.BORDER);
yTextBox.setText(" ");
yTextBox.setBounds(37, 52, 76, 21);
ArrayList<String> resultList = new ArrayList<String>();
String a = xTextBox.getText();
String b = yTextBox.getText();
CalculationClass clClass = new CalculationClass(a, b);
Label ResultsLabel = new Label(shell, SWT.NONE);
ResultsLabel.setBounds(10, 93, 424, 15);
ResultsLabel.setText("No. X Op Y =Result");
Button addButton = new Button(shell, SWT.NONE);
addButton.setToolTipText("press to add the numbers");
addButton.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
int a,b;
try{
a=Integer.parseInt(xTextBox.getText());
}
catch(Exception e1){
MessageDialog.openError(shell, "Error", "Bad number");
return;
}
try{
b=Integer.parseInt(yTextBox.getText());
}
catch(Exception e1){
MessageDialog.openError(shell, "Error", "Bad number");
return;
}
int answer=a+b;
ResultsLabel.setText("No. X Op Y =Result"+answer);
}
});
addButton.setBounds(273, 10, 55, 21);
addButton.setText("+");
Button subractButton = new Button(shell, SWT.NONE);
subractButton.setToolTipText("press to subract the numbers");
subractButton.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
int a,b;
try{
a=Integer.parseInt(xTextBox.getText());
}
catch(Exception e1){
MessageDialog.openError(shell, "Error", "Bad number");
return;
}
try{
b=Integer.parseInt(yTextBox.getText());
}
catch(Exception e1){
MessageDialog.openError(shell, "Error", "Bad number");
return;
}
int answer=a-b;
ResultsLabel.setText("No. X Op Y = "+answer);
}
});
subractButton.setBounds(273, 52, 55, 21);
subractButton.setText("-");
Button multiplyButton = new Button(shell, SWT.NONE);
multiplyButton.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
int a,b;
try{
a=Integer.parseInt(xTextBox.getText());
}
catch(Exception e1){
MessageDialog.openError(shell, "Error", "Bad number");
return;
}
try{
b=Integer.parseInt(yTextBox.getText());
}
catch(Exception e1){
MessageDialog.openError(shell, "Error", "Bad number");
return;
}
int answer=a*b;
ResultsLabel.setText("No. X Op Y = "+answer);
}
});
multiplyButton.setToolTipText("press to multiply the numbers");
multiplyButton.setBounds(356, 10, 55, 21);
multiplyButton.setText("*");
Button divideButton = new Button(shell, SWT.NONE);
divideButton.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
int a,b;
try{
a=Integer.parseInt(xTextBox.getText());
}
catch(Exception e1){
MessageDialog.openError(shell, "Error", "Bad number");
return;
}
try{
b=Integer.parseInt(yTextBox.getText());
}
catch(Exception e1){
MessageDialog.openError(shell, "Error", "Bad number");
return;
}
int answer=a+b;
ResultsLabel.setText("No. X Op Y = "+answer);
}
});
divideButton.setToolTipText("press to divide the numbers");
divideButton.setBounds(356, 52, 55, 21);
divideButton.setText("/");
Label lblX = new Label(shell, SWT.NONE);
lblX.setBounds(10, 10, 16, 21);
lblX.setText("X");
Label lblX_1 = new Label(shell, SWT.NONE);
lblX_1.setBounds(10, 10, 19, 15);
lblX_1.setText("X");
Label lblY = new Label(shell, SWT.NONE);
lblY.setBounds(10, 52, 19, 15);
lblY.setText("Y");
String result = new String();
result = ResultsLabel.getText()+"/n";
for(String s: resultList){
result = result+s+"/n";
}
SashForm sashForm = new SashForm(shell, SWT.NONE);
sashForm.setBounds(10, 10, 0, 0);
Button resetButton = new Button(shell, SWT.NONE);
resetButton.setBounds(0, 226, 434, 25);
resetButton.setText("Reset");
Label label = new Label(shell, SWT.SEPARATOR | SWT.HORIZONTAL);
label.setBounds(0, 79, 434, 2);
Label label_1 = new Label(shell, SWT.SEPARATOR | SWT.HORIZONTAL);
label_1.setBounds(-21, 85, 455, 2);
Label label_2 = new Label(shell, SWT.SEPARATOR | SWT.VERTICAL);
label_2.setBounds(185, 0, 0, 80);
Label label_3 = new Label(shell, SWT.SEPARATOR | SWT.VERTICAL);
label_3.setBounds(201, 0, 0, 81);
Label label_4 = new Label(shell, SWT.SEPARATOR | SWT.VERTICAL);
label_4.setBounds(183, 0, 0, 77);
Label label_5 = new Label(shell, SWT.SEPARATOR | SWT.VERTICAL);
label_5.setBounds(185, 3, 10, 70);
}
}
不過，我不能在「無X運算Y =結果的下方盒打印的操作。 你能幫助我在這種情況下？
你好有人嗎？ – 2015-01-09 21:03:28
您可以編輯您提供的問題代碼，僅包含相關代碼嗎？這會讓其他人更容易瞭解問題所在 – 2015-01-10 03:06:50