Script Java

6.1 Instanzmethode versus Klassenmethode
}
setLayout(null);
setSize(560,420);
Button button;
place(sentence=new Label(),30,30,460,20);
place(button=new Button("SHOW"),490,30,40,20);
button.addActionListener(this);
place(subjectField=new TextField(),30,60,160,20);
subjectField.addActionListener(this);
place(verbField=new TextField(),200,60,160,20);
verbField.addActionListener(this);
place(objectField=new TextField(),370,60,160,20);
objectField.addActionListener(this);
place(subjectList=new List(),30,90,160,300);
place(verbList=new List(),200,90,160,300);
place(objectList=new List(),370,90,160,300);
setVisible(true);
sentence.setText("Enter phrases and press RETURN!");
subjectField.requestFocus();
private void update(List list, TextField textField) {
if (!textField.getText().equals("")) {
list.addItem(textField.getText());
textField.setText("");
}
}
}
public void actionPerformed(ActionEvent event){
if (event.getSource() instanceof TextField) { //RETURN
update(subjectList, subjectField);
update(verbList, verbField);
update(objectList, objectField);
subjectField.requestFocus();
}
else if (event.getActionCommand().equals("SHOW")) {
sentence.setText(
subjectList.getItem(Rndm.nextInt(subjectList.getItemCount()))+" "+
verbList.getItem(Rndm.nextInt(verbList.getItemCount()))+" "+
objectList.getItem(Rndm.nextInt(objectList.getItemCount())));
}
}
public class TestProg {
public static void main(String[] args) {new UserFrame();}
}
6.1.1 Zum Programm
Die Application bittet den Benutzer, Sätze einzugeben, wobei Subjekt, Verb und Objekt
getrennt voneinander in die separaten TextFields geschrieben werden müssen. Durch
Drücken der RETURN-Taste werden die Elemente aus den Textfeldern in die
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