public class TaxCalculation {	public static void main(String[] args) {		String a = JOptionPane.showInputDialog("请输入你的收入工资：");		String b = JOptionPane.showInputDialog("请输入你的五险一金：");		double salary = Double.parseDouble(a);		double insurance = Double.parseDouble(b);		salary = salary - insurance - 3500;		if (salary <= 0) {			JOptionPane.showMessageDialog(null, "你不需要缴纳个人所得税！");		} else if (salary <= 1500) {			JOptionPane.showMessageDialog(null, "你需要缴纳个人所得税为："					+ (salary * 0.03));		} else if (salary <= 4500) {			JOptionPane.showMessageDialog(null, "你需要缴纳个人所得税为："					+ (salary * 0.1 - 105));		} else if (salary <= 9500) {			JOptionPane.showMessageDialog(null, "你需要缴纳个人所得税为："					+ (salary * 0.2 - 555));		} else if (salary <= 35000) {			JOptionPane.showMessageDialog(null, "你需要缴纳个人所得税为："					+ (salary * 0.25 - 1005));		} else if (salary <= 55000) {			JOptionPane.showMessageDialog(null, "你需要缴纳个人所得税为："					+ (salary * 0.3 - 2755));		} else if (salary <= 80000) {			JOptionPane.showMessageDialog(null, "你需要缴纳个人所得税为："					+ (salary * 0.35 - 5505));		} else if (salary < 80000) {			JOptionPane.showMessageDialog(null, "你需要缴纳个人所得税为："					+ (salary * 0.45 - 13505));		}	}}