编写一个Java应用程序，设计工资类，包括但不限职工工号、职工姓名、岗位工资、薪级工资、职务津贴、绩效工资、应发工资、个人所得税和实发工资。通过键盘操作读取指定工资文本信息，对工资类对象赋值并在控制台输出打印结果。

好的，我会帮您解答这个问题。

首先，我们需要创建一个工资类，包括以下属性：

public class Salary {
    private String employeeId;      // 职工工号
    private String employeeName;    // 职工姓名
    private double jobSalary;       // 岗位工资
    private double gradeSalary;     // 薪级工资
    private double allowance;       // 职务津贴
    private double performance;     // 绩效工资
    private double grossSalary;     // 应发工资
    private double personalTax;     // 个人所得税
    private double netSalary;       // 实发工资
    
    // 构造方法
    public Salary(String employeeId, String employeeName, double jobSalary, double gradeSalary,
                  double allowance, double performance) {
        this.employeeId = employeeId;
        this.employeeName = employeeName;
        this.jobSalary = jobSalary;
        this.gradeSalary = gradeSalary;
        this.allowance = allowance;
        this.performance = performance;
    }
    
    // 计算应发工资
    public void calculateGrossSalary() {
        this.grossSalary = jobSalary + gradeSalary + allowance + performance;
    }
    
    // 计算个人所得税
    public void calculatePersonalTax() {
        if (grossSalary <= 3500) {
            personalTax = 0;
        } else {
            double taxableIncome = grossSalary - 3500;
            if (taxableIncome <= 1500) {
                personalTax = taxableIncome * 0.03;
            } else if (taxableIncome <= 4500) {
                personalTax = taxableIncome * 0.1 - 105;
            } else if (taxableIncome <= 9000) {
                personalTax = taxableIncome * 0.2 - 555;
            } else if (taxableIncome <= 35000) {
                personalTax = taxableIncome * 0.25 - 1005;
            } else if (taxableIncome <= 55000) {
                personalTax = taxableIncome * 0.3 - 2755;
            } else if (taxableIncome <= 80000) {
                personalTax = taxableIncome * 0.35 - 5505;
            } else {
                personalTax = taxableIncome * 0.45 - 13505;
            }
        }
    }
    
    // 计算实发工资
    public void calculateNetSalary() {
        netSalary = grossSalary - personalTax;
    }
    
    // 打印工资信息
    public void printSalary() {
        System.out.println("职工工号：" + employeeId);
        System.out.println("职工姓名：" + employeeName);
        System.out.println("岗位工资：" + jobSalary);
        System.out.println("薪级工资：" + gradeSalary);
        System.out.println("职务津贴：" + allowance);
        System.out.println("绩效工资：" + performance);
        System.out.println("应发工资：" + grossSalary);
        System.out.println("个人所得税：" + personalTax);
        System.out.println("实发工资：" + netSalary);
    }
}

然后，我们需要编写一个程序，通过键盘读取指定工资文本信息，创建工资类对象并赋值，计算应发工资、个人所得税和实发工资，并输出打印结果。具体代码如下：

import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;

public class SalaryApplication {
    public static void main(String[] args) {
        try {
            // 读取指定工资文本信息
            Scanner scanner = new Scanner(new File("salary.txt"));
            while (scanner.hasNextLine()) {
                String line = scanner.nextLine();
                String[] fields = line.split(",");
                
                // 创建工资类对象并赋值
                Salary salary = new Salary(fields[0], fields[1], Double.parseDouble(fields[2]),
                                           Double.parseDouble(fields[3]), Double.parseDouble(fields[4]),
                                           Double.parseDouble(fields[5]));
                
                // 计算应发工资、个人所得税和实发工资
                salary.calculateGrossSalary();
                salary.calculatePersonalTax();
                salary.calculateNetSalary();
                
                // 输出打印结果
                salary.printSalary();
            }
            scanner.close();
        } catch (FileNotFoundException e) {
            System.out.println("指定工资文本文件不存在！");
        }
    }
}

在上述代码中，我们假设工资文本文件名为"salary.txt"，每行包括职工工号、职工姓名、岗位工资、薪级工资、职务津贴和绩效工资，以逗号分隔。程序通过Scanner类逐行读取工资文本信息，创建工资类对象并赋值，计算应发工资、个人所得税和实发工资，最后输出打印结果。

希望这个示例代码能够帮到您。