我有一个Jtextfield,我在里面写了一个结果。然后我想在我的光标在jtextfield中时按Enter键,并激活一个名为next的jbutton。我必须使用我的构造函数这个命令:“getRootPane()。setDefaultButton(接下来),“并且工作得很好。在我从所有jbuttons和jlabels中设置字体后,然后当我写i jtextfield并按下输入时,没有任何事情发生。
public class PrakseisGameGUI extends javax.swing.JFrame {
int correctAns;
int allAns;
int oldResult;
int flag;
public PrakseisGameGUI() {
initComponents();
getRootPane().setDefaultButton(next);
Global.correctAns = 0;
Global.allAns = 0;
oldResult = -500;
flag = 0;
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
private void nextActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String sResult;
String sCorAns;
String sAllAns;
String sOperator;
int iFirstNum = 0;
int iSecNum = 0;
int iOperator = 0;
int iResult = 0;
int iCorResult = 0;
int oldFirstNum = 0;
int oldSecNum = 0;
int oldOperator = 0;
Random rand = new Random();
JFrame frame = new JFrame();
JButton btn = new JButton("Next");
frame.getRootPane().setDefaultButton(btn);
if(Global.epdi == 1){
iFirstNum = rand.nextInt(11);
iSecNum = rand.nextInt(11);
iOperator = rand.nextInt(2);
}else if(Global.epdi == 2){
iFirstNum = rand.nextInt(11);
iSecNum = rand.nextInt(11);
iOperator = rand.nextInt(3);
}else if(Global.epdi == 3){
iFirstNum = rand.nextInt(20);
iSecNum = rand.nextInt(11);
iOperator = rand.nextInt(3);
}else{
iFirstNum = rand.nextInt(11);
iSecNum = rand.nextInt(11);
iOperator = rand.nextInt(2);
}
if(iOperator == 0){
sOperator = "+";
iCorResult = iFirstNum + iSecNum;
}else if(iOperator == 1){
sOperator = "-";
iCorResult = iFirstNum - iSecNum;
}else if(iOperator == 2){
sOperator = "*";
iCorResult = iFirstNum * iSecNum;
}else{
sOperator = "-----";
iCorResult = 0;
}
firstNum.setText(String.valueOf(iFirstNum));
operator.setText(sOperator);
secNum.setText(String.valueOf(iSecNum));
stableOperator.setText("=");
slash.setText("/");
long startTime = System.nanoTime();
if((oldResult != -500) && (flag == 1)){
sResult = result.getText();
iResult = Integer.parseInt(sResult);
System.out.format("%d,%d\n",iResult,oldResult);
if(iResult == oldResult){
Global.correctAns++;
}
//result.setText("");
oldResult = iCorResult;
Global.allAns++;
}else if(flag == 0) {
oldResult = iCorResult;
flag =1;
}
sCorAns = String.valueOf(Global.correctAns);
sAllAns = String.valueOf(Global.allAns);
corAnswer.setText(sCorAns);
allAnswer.setText(sAllAns);
if(Global.allAns == 10){
Global.estimatedTime = System.nanoTime() - startTime;
System.out.format("%d\n", Global.estimatedTime);
setVisible(false);
seeResults seRes = new seeResults();
seRes.setVisible(true);
}
}
private void nextKeyPressed(java.awt.event.KeyEvent evt) {
// TODO add your handling code here:
}
private void resultActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new PrakseisGameGUI().setVisible(true);
}
});
}
答案 0 :(得分:1)
我有一个Jtextfield,我在里面写了一个结果。然后我想在我的光标在jtextfield中时按Enter键,然后激活一个名为next的jbutton。
对文本字段和按钮使用相同的ActionListener。
ActionListener next = new ActionListener(...);
textField.addActionListener( next );
button.addActionListener( next );