Java 当我在jTextField1中输入一个数字时,案例不会被处理
例如,我在Java 当我在jTextField1中输入一个数字时,案例不会被处理,java,user-interface,switch-statement,Java,User Interface,Switch Statement,例如,我在组合框中输入1,在jTextField1中输入50,正确答案不会出现。这将是运行应用程序的代码,以将选定的温度(如celcius、fairenheit或kelvin)转换为所需的温度。现在,我只是尝试使用1和4之间的选择格式。我以后再换Jbutton1是要转换的按钮,单击该按钮时应执行其中的所有代码。但出于某种原因,它不想就我早些时候定义的案件颁布法律。它应该取输入的温度并加273 public class Conversion extends javax.swing.JFrame {
组合框
中输入1,在jTextField1
中输入50,正确答案不会出现。这将是运行应用程序的代码,以将选定的温度(如celcius、fairenheit或kelvin)转换为所需的温度。现在,我只是尝试使用1和4之间的选择格式。我以后再换Jbutton1
是要转换的按钮,单击该按钮时应执行其中的所有代码。但出于某种原因,它不想就我早些时候定义的案件颁布法律。它应该取输入的温度并加273
public class Conversion extends javax.swing.JFrame {
int calculation = 0;
String temphold;
double input_temp;
/**
* Creates new form Conversion
*/
public Conversion() {
initComponents();
}
public void cases() {
switch (calculation) {
case 1:
input_temp = input_temp + 273.5;
break;
}
}
/**
* 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")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jTextField1 = new javax.swing.JTextField();
jComboBox1 = new javax.swing.JComboBox<>();
jButton1 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jTextField1.setText("jTextField1");
jComboBox1.setModel(new javax.swing.DefaultComboBoxModel<>(new String[] { "1", "2", "3", "4" }));
jButton1.setText("jButton1");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(126, 126, 126)
.addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(207, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(113, 113, 113))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addComponent(jButton1)
.addGap(67, 67, 67))))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(58, 58, 58)
.addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(35, 35, 35)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 75, Short.MAX_VALUE)
.addComponent(jButton1)
.addGap(50, 50, 50))
);
pack();
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
temphold = (String) jComboBox1.getSelectedItem();
String hold = jTextField1.getText();
input_temp = Double.parseDouble(hold);
if (temphold == "1") {
calculation = 1;
System.out.println("monkey");
System.out.println(input_temp);
}
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(Conversion.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Conversion.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(Conversion.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Conversion.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Conversion().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JComboBox<String> jComboBox1;
private javax.swing.JTextField jTextField1;
// End of variables declaration
}
公共类转换扩展了javax.swing.JFrame{
int计算=0;
字符串临时保持;
双输入温度;
/**
*创建新的表单转换
*/
公共转换(){
初始化组件();
}
公共无效案件(){
开关(计算){
案例1:
输入温度=输入温度+273.5;
打破
}
}
/**
*从构造函数中调用此方法来初始化表单。
*警告:不要修改此代码。此方法的内容始终为
*由表单编辑器重新生成。
*/
@抑制警告(“未选中”)
//
私有组件(){
jTextField1=newjavax.swing.JTextField();
jcombox1=newjavax.swing.JComboBox();
jButton1=newjavax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jTextField1.setText(“jTextField1”);
setModel(新的javax.swing.DefaultComboxModel(新的字符串[]{“1”、“2”、“3”、“4”);
setText(“jButton1”);
jButton1.addActionListener(新java.awt.event.ActionListener(){
public void actionPerformed(java.awt.event.ActionEvent evt){
jButton1ActionPerformed(evt);
}
});
javax.swing.GroupLayout=newjavax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(布局);
layout.setHorizontalGroup(
createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(126126126)
.addComponent(jcombox1,javax.swing.GroupLayout.PREFERRED\u SIZE,javax.swing.GroupLayout.DEFAULT\u SIZE,javax.swing.GroupLayout.PREFERRED\u SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT\u SIZE,Short.MAX\u VALUE))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING,layout.createSequentialGroup()
.addContainerGap(207,简称最大值)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING,layout.createSequentialGroup()
.addComponent(jTextField1,javax.swing.GroupLayout.PREFERRED\u SIZE,javax.swing.GroupLayout.DEFAULT\u SIZE,javax.swing.GroupLayout.PREFERRED\u SIZE)
.addGap(113、113、113))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING,layout.createSequentialGroup()
.addComponent(jButton1)
.addGap(67,67,67)))
);
layout.setVerticalGroup(
createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(58,58,58)
.addComponent(jcombox1,javax.swing.GroupLayout.PREFERRED\u SIZE,javax.swing.GroupLayout.DEFAULT\u SIZE,javax.swing.GroupLayout.PREFERRED\u SIZE)
.addGap(35,35,35)
.addComponent(jTextField1,javax.swing.GroupLayout.PREFERRED\u SIZE,javax.swing.GroupLayout.DEFAULT\u SIZE,javax.swing.GroupLayout.PREFERRED\u SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED,75,Short.MAX_值)
.addComponent(jButton1)
.addGap(50,50,50))
);
包装();
}//
私有void jButton1ActionPerformed(java.awt.event.ActionEvent evt){
//TODO在此处添加您的处理代码:
temphold=(字符串)jCombox1.getSelectedItem();
String hold=jTextField1.getText();
输入温度=Double.parseDouble(保持);
如果(临时控股=“1”){
计算=1;
System.out.println(“monkey”);
系统输出打印LN(输入温度);
}
}
/**
*@param指定命令行参数
*/
公共静态void main(字符串参数[]){
/*设置Nimbus的外观和感觉*/
//
/*如果Nimbus(在JavaSE6中引入)不可用,请使用默认的外观。
*详情请参阅http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
试一试{
for(javax.swing.UIManager.LookAndFeelInfo:javax.swing.UIManager.getInstalledLookAndFeels()){
if(“Nimbus”.equals(info.getName())){
setLookAndFeel(info.getClassName());
打破
}
}
}捕获(ClassNotFoundException ex){
getLogger(Conversion.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}catch(实例化异常){
getLogger(Conversion.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}捕获(非法访问例外){
getLogger(Conversion.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}catch(javax.swing.UnsupportedLookAndFeelException ex){
java.ut