按钮可以保存用户输入并在以后访问?用java
你认为这个问题很傻,但对我来说很难,因为我只是一个对java有兴趣的人,我会在几个小时内从中搜索。 请注意,我正在使用netbeans 8按钮可以保存用户输入并在以后访问?用java,java,netbeans,input,save,Java,Netbeans,Input,Save,你认为这个问题很傻,但对我来说很难,因为我只是一个对java有兴趣的人,我会在几个小时内从中搜索。 请注意,我正在使用netbeans 8 谢谢你 有很多方法,您可以使用JOptionPane从消息对话框进行输入 作业窗格始终返回字符串 然后可以将输入数据保存在变量中 如果获取字段值,则必须首先将信息保存在全局变量中,然后访问它 import javax.swing.JOptionPane; public class example extends javax.swing.JFrame {
谢谢你 有很多方法,您可以使用JOptionPane从消息对话框进行输入 作业窗格始终返回字符串
然后可以将输入数据保存在变量中 如果获取字段值,则必须首先将信息保存在全局变量中,然后访问它
import javax.swing.JOptionPane;
public class example extends javax.swing.JFrame {
String nameStr = ""; //Here I save the name entered.
public example() {
initComponents();
}
private void okBtnActionPerformed(java.awt.event.ActionEvent evt) {
nameStr = nameTxt.getText();
nameTxt.setText("");
}
private void showBtnActionPerformed(java.awt.event.ActionEvent evt) {
JOptionPane.showMessageDialog(null, "You entered this name: " + nameStr);
}
public static void main(String args[]) {
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new example().setVisible(true);
}
});
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
aboutLbl = new javax.swing.JLabel();
inputLbl = new javax.swing.JLabel();
nameTxt = new javax.swing.JTextField();
okBtn = new javax.swing.JButton();
showBtn = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
aboutLbl.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
aboutLbl.setText("Example by José Peña");
inputLbl.setText("Input your name:");
okBtn.setText("OK");
okBtn.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
okBtnActionPerformed(evt);
}
});
showBtn.setText("Show my name entered");
showBtn.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
showBtnActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addGroup(layout.createSequentialGroup()
.addComponent(showBtn, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addContainerGap())
.addComponent(aboutLbl)
.addGroup(layout.createSequentialGroup()
.addComponent(inputLbl)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(nameTxt, javax.swing.GroupLayout.PREFERRED_SIZE, 219, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(okBtn))))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(aboutLbl)
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(inputLbl)
.addComponent(nameTxt, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(okBtn))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(showBtn)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
// Variables declaration - do not modify
private javax.swing.JLabel aboutLbl;
private javax.swing.JLabel inputLbl;
private javax.swing.JTextField nameTxt;
private javax.swing.JButton okBtn;
private javax.swing.JButton showBtn;
// End of variables declaration
}
import javax.swing.JOptionPane;
公共类示例扩展了javax.swing.JFrame{
String nameStr=“”;//这里保存输入的名称。
公共示例(){
初始化组件();
}
私有void okBtnActionPerformed(java.awt.event.ActionEvent evt){
nameStr=nameTxt.getText();
nameTxt.setText(“”);
}
私有void showBtnActionPerformed(java.awt.event.ActionEvent evt){
showMessageDialog(null,“您输入的名称:”+nameStr);
}
公共静态void main(字符串参数[]){
/*创建并显示表单*/
invokeLater(new Runnable()){
公开募捐{
新示例().setVisible(true);
}
});
}
@抑制警告(“未选中”)
//
私有组件(){
aboutbl=newjavax.swing.JLabel();
inputLbl=newjavax.swing.JLabel();
nameTxt=newjavax.swing.JTextField();
okBtn=newjavax.swing.JButton();
showBtn=newjavax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
aboutbl.setFont(新的java.awt.Font(“Tahoma”,1,18));//NOI18N
关于bl.setText(“何塞·佩尼亚的例子”);
inputLbl.setText(“输入您的姓名:”);
okBtn.setText(“确定”);
okBtn.addActionListener(新的java.awt.event.ActionListener(){
public void actionPerformed(java.awt.event.ActionEvent evt){
已执行的OkbtNaction(evt);
}
});
showBtn.setText(“显示输入的我的姓名”);
showBtn.addActionListener(新的java.awt.event.ActionListener(){
public void actionPerformed(java.awt.event.ActionEvent evt){
表演表演(evt);
}
});
javax.swing.GroupLayout=newjavax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(布局);
layout.setHorizontalGroup(
createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING,layout.createSequentialGroup()
.addContainerGap(javax.swing.GroupLayout.DEFAULT\u SIZE,Short.MAX\u值)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING,false)
.addGroup(layout.createSequentialGroup()
.addComponent(showBtn,javax.swing.GroupLayout.DEFAULT\u SIZE,javax.swing.GroupLayout.DEFAULT\u SIZE,Short.MAX\u值)
.addContainerGap())
.addComponent(大约BL)
.addGroup(layout.createSequentialGroup()
.addComponent(inputLbl)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(nameTxt,javax.swing.GroupLayout.PREFERRED\u SIZE,219,javax.swing.GroupLayout.PREFERRED\u SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(okBtn)))
);
layout.setVerticalGroup(
createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(大约BL)
.addGap(18,18,18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(inputLbl)
.addComponent(nameTxt、javax.swing.GroupLayout.PREFERRED\u SIZE、javax.swing.GroupLayout.DEFAULT\u SIZE、javax.swing.GroupLayout.PREFERRED\u SIZE)
.addComponent(okBtn))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(showBtn)
.addContainerGap(javax.swing.GroupLayout.DEFAULT\u SIZE,Short.MAX\u VALUE))
);
包装();
}//
//变量声明-不修改
私有javax.swing.JLabel aboutLbl;
私有javax.swing.JLabel inputLbl;
私有javax.swing.JTextField nameTxt;
私有javax.swing.JButton-okBtn;
私有javax.swing.JButton showBtn;
//变量结束声明
}
请详细说明您想用按钮做什么?如果它是简单的数据,那么当使用ActionListener按下按钮时,您可以为变量指定一些值。您在使用哪些应用程序宠物方面有困难?显示按钮,响应用户操作,保存文件?