Java程序界面设计
用JavaFX实现图形用户界面，计算应交的税款。
代码详情：
Mytax.java
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.geometry.HPos;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ComboBox;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;
/**
* 计算贷款
* @author
*
*/
publicclass Mytax extends Application{
/**年收入文本框*/
private TextField tfAnnualincome=new TextField();
/**家庭状况*/
private TextField tfstatus=new TextField();
/**计算税按钮*/
private Button btCal=new Button("计算税");
/**应缴税款文本框*/
private Label tftax=new Label();
/**组合框*/
private ComboBox
@Override
publicvoid start(Stage primaryStage) throws Exception {
GridPane gridPane=new GridPane();//创建网格面板
gridPane.setHgap(10);//设置横向间隙
gridPane.setVgap(4);//设置纵向间隙
//依次添加标签和文本框
gridPane.add(new Label("年收入："), 0, 0);
gridPane.add(tfAnnualincome,1,0);
gridPane.add(new Label("家庭情况："), 0, 1);
gridPane.add(cbStatus, 1, 1);
gridPane.add(btCal, 1, 2);
gridPane.add(new Label("应缴税款："),0, 3);
gridPane.add(tftax, 1, 3);
//设置居中对齐，靠右对齐
gridPane.setAlignment(Pos.CENTER);
this.tfAnnualincome.setAlignment(Pos.BOTTOM_LEFT);
String[] status={"单身","已婚联合付税","已婚单独付税","户主"};
ObservableList
cbStatus.getItems().addAll(items);
cbStatus.setStyle("-fx-color:blue");
cbStatus.setValue("单身");
this.btCal.setOnAction(e ->calculateTax(items.indexOf(cbStatus.getValue())) );
this.tftax.setAlignment(Pos.CENTER);
//设置按钮的水平位置
GridPane.setHalignment(btCal, HPos.LEFT);
//显示出面板
Scene scene=new Scene(gridPane,500,300);
primaryStage.setTitle("计算税");
primaryStage.setScene(scene);
primaryStage.show();
}
/**
* 计算贷款数据
*/
privatevoid calculateTax(intindex){
//从文本框中获得利率
doubleincome =
Double.parseDouble(this.tfAnnualincome.getText());
//创建Tax对象
Tax tax = new Tax(index,income);
doublet=tax.computeTax();
tftax.setText(String.format("$%.2f", t));
}
publicstaticvoid main(String[] args){
launch();
}
}
Tax.java
publicclass Tax {
privateintstatus ;//家庭状态
privatedoubleincome;//收入
privatedoubletax;//应缴的税款
//用数组rates保存每个档次对应的税率
privatedouble[] rates = {0.10, 0.15, 0.25, 0.28, 0.33, 0.35};
//用二维数组保存税率表，左下标记录家庭状况，右下标记录收入档次
privateint[][] brackets = {
{8350, 33950,82250, 171550, 372950}, // Single filer
{16700, 67900,137050, 208850, 372950}, // Marriedjointly
{8350, 33950,68525, 104425, 186475}, // Marriedseparately
{11950, 45500,117450, 190200, 372950} // Head ofhousehold
};
publicstaticfinalintSINGLE_FILER=0;
publicstaticfinalintMARRIED_JOINTLY=1;
publicstaticfinalintQUALIFIED_WIDOER=1;
publicstaticfinalintMARRIED_SEPARATELY=2;
publicstaticfinalintHEAD_OF_HOUSEHOLD=3;
/**
* 无参构造方法
*/
public Tax() {
this(0,0);
}
/**
* 用家庭状态和收入构建一个tax对象
* @param status 家庭状态
* @param income 收入
*/
public Tax(intstatus, doubleincome) {
this.status = status;
this.income = income;
}
/**
* 计算税款
* @param status 家庭状况
* @param income 收入
* @return tax 应交税款
*/
publicdouble computeTax(){
// 计算第一个区域里的税
if (income <= brackets[status][0])
returntax = income * rates[0]; // 得出结果
else
tax = brackets[status][0] * rates[0];//得出第一区域的税
// 计算剩余区域的税
for (inti = 1; i < brackets[0].length; i++) {
if (income > brackets[status][i])//如果收入大于区域界限
tax += (brackets[status][i] - brackets[status][i - 1]) *
rates[i];//计算这个区域的税
else {//如果收入小于这个区域的界限
tax += (income - brackets[status][i - 1]) * rates[i];
returntax; // 计算还没有计算的税
}
}
// 此时还没有返回，计算超出上界的税
return tax += (income - brackets[status][4]) * rates[5];
}
/**
* @return the tax
*/
publicdouble getTax() {
returntax;
}
/**
* @param tax the tax toset
*/
publicvoid setTax(doubletax) {
this.tax = tax;
}
/**
* @return the rates
*/
publicdouble[] getRates() {
returnrates;
}
/**
* @param rates the ratesto set
*/
publicvoid setRates(double[] rates) {
this.rates = rates;
}
/**
* @return the brackets
*/
publicint[][] getBrackets() {
returnbrackets;
}
/**
* @param brackets thebrackets to set
*/
publicvoid setBrackets(int[][] brackets) {
this.brackets = brackets;
}
/**
* @return the status
*/
publicint getStatus() {
returnstatus;
}
/**
* @param status thestatus to set
*/
publicvoid setStatus(intstatus) {
this.status = status;
}
/**
* @return the income
*/
publicdouble getIncome() {
returnincome;
}
/**
* @param income theincome to set
*/
publicvoid setIncome(doubleincome) {
this.income = income;
}
}
Mytax.java
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.geometry.HPos;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ComboBox;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;
/**
* 计算贷款
* @author
*
*/
publicclass Mytax extends Application{
/**年收入文本框*/
private TextField tfAnnualincome=new TextField();
/**家庭状况*/
private TextField tfstatus=new TextField();
/**计算税按钮*/
private Button btCal=new Button("计算税");
/**应缴税款文本框*/
private Label tftax=new Label();
/**组合框*/
private ComboBox
@Override
publicvoid start(Stage primaryStage) throws Exception {
GridPane gridPane=new GridPane();//创建网格面板
gridPane.setHgap(10);//设置横向间隙
gridPane.setVgap(4);//设置纵向间隙
//依次添加标签和文本框
gridPane.add(new Label("年收入："), 0, 0);
gridPane.add(tfAnnualincome,1,0);
gridPane.add(new Label("家庭情况："), 0, 1);
gridPane.add(cbStatus, 1, 1);
gridPane.add(btCal, 1, 2);
gridPane.add(new Label("应缴税款："),0, 3);
gridPane.add(tftax, 1, 3);
//设置居中对齐，靠右对齐
gridPane.setAlignment(Pos.CENTER);
this.tfAnnualincome.setAlignment(Pos.BOTTOM_LEFT);
String[] status={"单身","已婚联合付税","已婚单独付税","户主"};
ObservableList
cbStatus.getItems().addAll(items);
cbStatus.setStyle("-fx-color:blue");
cbStatus.setValue("单身");
this.btCal.setOnAction(e ->calculateTax(items.indexOf(cbStatus.getValue())) );
this.tftax.setAlignment(Pos.CENTER);
//设置按钮的水平位置
GridPane.setHalignment(btCal, HPos.LEFT);
//显示出面板
Scene scene=new Scene(gridPane,500,300);
primaryStage.setTitle("计算税");
primaryStage.setScene(scene);
primaryStage.show();
}
/**
* 计算贷款数据
*/
privatevoid calculateTax(intindex){
//从文本框中获得利率
doubleincome =
Double.parseDouble(this.tfAnnualincome.getText());
//创建Tax对象
Tax tax = new Tax(index,income);
doublet=tax.computeTax();
tftax.setText(String.format("$%.2f", t));
}
publicstaticvoid main(String[] args){
launch();
}
}
Tax.java
publicclass Tax {
privateintstatus ;//家庭状态
privatedoubleincome;//收入
privatedoubletax;//应缴的税款
//用数组rates保存每个档次对应的税率
privatedouble[] rates = {0.10, 0.15, 0.25, 0.28, 0.33, 0.35};
//用二维数组保存税率表，左下标记录家庭状况，右下标记录收入档次
privateint[][] brackets = {
{8350, 33950,82250, 171550, 372950}, // Single filer
{16700, 67900,137050, 208850, 372950}, // Marriedjointly
{8350, 33950,68525, 104425, 186475}, // Marriedseparately
{11950, 45500,117450, 190200, 372950} // Head ofhousehold
};
publicstaticfinalintSINGLE_FILER=0;
publicstaticfinalintMARRIED_JOINTLY=1;
publicstaticfinalintQUALIFIED_WIDOER=1;
publicstaticfinalintMARRIED_SEPARATELY=2;
publicstaticfinalintHEAD_OF_HOUSEHOLD=3;
/**
* 无参构造方法
*/
public Tax() {
this(0,0);
}
/**
* 用家庭状态和收入构建一个tax对象
* @param status 家庭状态
* @param income 收入
*/
public Tax(intstatus, doubleincome) {
this.status = status;
this.income = income;
}
/**
* 计算税款
* @param status 家庭状况
* @param income 收入
* @return tax 应交税款
*/
publicdouble computeTax(){
// 计算第一个区域里的税
if (income <= brackets[status][0])
returntax = income * rates[0]; // 得出结果
else
tax = brackets[status][0] * rates[0];//得出第一区域的税
// 计算剩余区域的税
for (inti = 1; i < brackets[0].length; i++) {
if (income > brackets[status][i])//如果收入大于区域界限
tax += (brackets[status][i] - brackets[status][i - 1]) *
rates[i];//计算这个区域的税
else {//如果收入小于这个区域的界限
tax += (income - brackets[status][i - 1]) * rates[i];
returntax; // 计算还没有计算的税
}
}
// 此时还没有返回，计算超出上界的税
return tax += (income - brackets[status][4]) * rates[5];
}
/**
* @return the tax
*/
publicdouble getTax() {
returntax;
}
/**
* @param tax the tax toset
*/
publicvoid setTax(doubletax) {
this.tax = tax;
}
/**
* @return the rates
*/
publicdouble[] getRates() {
returnrates;
}
/**
* @param rates the ratesto set
*/
publicvoid setRates(double[] rates) {
this.rates = rates;
}
/**
* @return the brackets
*/
publicint[][] getBrackets() {
returnbrackets;
}
/**
* @param brackets thebrackets to set
*/
publicvoid setBrackets(int[][] brackets) {
this.brackets = brackets;
}
/**
* @return the status
*/
publicint getStatus() {
returnstatus;
}
/**
* @param status thestatus to set
*/
publicvoid setStatus(intstatus) {
this.status = status;
}
/**
* @return the income
*/
publicdouble getIncome() {
returnincome;
}
/**
* @param income theincome to set
*/
publicvoid setIncome(doubleincome) {
this.income = income;
}
}
总结：通过本实例，
Mytax.java
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.geometry.HPos;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ComboBox;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;
/**
* 计算贷款
* @author
*
*/
publicclass Mytax extends Application{
/**年收入文本框*/
private TextField tfAnnualincome=new TextField();
/**家庭状况*/
private TextField tfstatus=new TextField();
/**计算税按钮*/
private Button btCal=new Button("计算税");
/**应缴税款文本框*/
private Label tftax=new Label();
/**组合框*/
private ComboBox
@Override
publicvoid start(Stage primaryStage) throws Exception {
GridPane gridPane=new GridPane();//创建网格面板
gridPane.setHgap(10);//设置横向间隙
gridPane.setVgap(4);//设置纵向间隙
//依次添加标签和文本框
gridPane.add(new Label("年收入："), 0, 0);
gridPane.add(tfAnnualincome,1,0);
gridPane.add(new Label("家庭情况："), 0, 1);
gridPane.add(cbStatus, 1, 1);
gridPane.add(btCal, 1, 2);
gridPane.add(new Label("应缴税款："),0, 3);
gridPane.add(tftax, 1, 3);
//设置居中对齐，靠右对齐
gridPane.setAlignment(Pos.CENTER);
this.tfAnnualincome.setAlignment(Pos.BOTTOM_LEFT);
String[] status={"单身","已婚联合付税","已婚单独付税","户主"};
ObservableList
cbStatus.getItems().addAll(items);
cbStatus.setStyle("-fx-color:blue");
cbStatus.setValue("单身");
this.btCal.setOnAction(e ->calculateTax(items.indexOf(cbStatus.getValue())) );
this.tftax.setAlignment(Pos.CENTER);
//设置按钮的水平位置
GridPane.setHalignment(btCal, HPos.LEFT);
//显示出面板
Scene scene=new Scene(gridPane,500,300);
primaryStage.setTitle("计算税");
primaryStage.setScene(scene);
primaryStage.show();
}
/**
* 计算贷款数据
*/
privatevoid calculateTax(intindex){
//从文本框中获得利率
doubleincome =
Double.parseDouble(this.tfAnnualincome.getText());
//创建Tax对象
Tax tax = new Tax(index,income);
doublet=tax.computeTax();
tftax.setText(String.format("$%.2f", t));
}
publicstaticvoid main(String[] args){
launch();
}
}
Tax.java
publicclass Tax {
privateintstatus ;//家庭状态
privatedoubleincome;//收入
privatedoubletax;//应缴的税款
//用数组rates保存每个档次对应的税率
privatedouble[] rates = {0.10, 0.15, 0.25, 0.28, 0.33, 0.35};
//用二维数组保存税率表，左下标记录家庭状况，右下标记录收入档次
privateint[][] brackets = {
{8350, 33950,82250, 171550, 372950}, // Single filer
{16700, 67900,137050, 208850, 372950}, // Marriedjointly
{8350, 33950,68525, 104425, 186475}, // Marriedseparately
{11950, 45500,117450, 190200, 372950} // Head ofhousehold
};
publicstaticfinalintSINGLE_FILER=0;
publicstaticfinalintMARRIED_JOINTLY=1;
publicstaticfinalintQUALIFIED_WIDOER=1;
publicstaticfinalintMARRIED_SEPARATELY=2;
publicstaticfinalintHEAD_OF_HOUSEHOLD=3;
/**
* 无参构造方法
*/
public Tax() {
this(0,0);
}
/**
* 用家庭状态和收入构建一个tax对象
* @param status 家庭状态
* @param income 收入
*/
public Tax(intstatus, doubleincome) {
this.status = status;
this.income = income;
}
/**
* 计算税款
* @param status 家庭状况
* @param income 收入
* @return tax 应交税款
*/
publicdouble computeTax(){
// 计算第一个区域里的税
if (income <= brackets[status][0])
returntax = income * rates[0]; // 得出结果
else
tax = brackets[status][0] * rates[0];//得出第一区域的税
// 计算剩余区域的税
for (inti = 1; i < brackets[0].length; i++) {
if (income > brackets[status][i])//如果收入大于区域界限
tax += (brackets[status][i] - brackets[status][i - 1]) *
rates[i];//计算这个区域的税
else {//如果收入小于这个区域的界限
tax += (income - brackets[status][i - 1]) * rates[i];
returntax; // 计算还没有计算的税
}
}
// 此时还没有返回，计算超出上界的税
return tax += (income - brackets[status][4]) * rates[5];
}
/**
* @return the tax
*/
publicdouble getTax() {
returntax;
}
/**
* @param tax the tax toset
*/
publicvoid setTax(doubletax) {
this.tax = tax;
}
/**
* @return the rates
*/
publicdouble[] getRates() {
returnrates;
}
/**
* @param rates the ratesto set
*/
publicvoid setRates(double[] rates) {
this.rates = rates;
}
/**
* @return the brackets
*/
publicint[][] getBrackets() {
returnbrackets;
}
/**
* @param brackets thebrackets to set
*/
publicvoid setBrackets(int[][] brackets) {
this.brackets = brackets;
}
/**
* @return the status
*/
publicint getStatus() {
returnstatus;
}
/**
* @param status thestatus to set
*/
publicvoid setStatus(intstatus) {
this.status = status;
}
/**
* @return the income
*/
publicdouble getIncome() {
returnincome;
}
/**
* @param income theincome to set
*/
publicvoid setIncome(doubleincome) {
this.income = income;
}
}