个人所得税计算

package com.kaige123.ifelse;
/**
* 凯哥
*/
public class TestIfElse {
	public static void main(String[] args) {
		java.util.Scanner input = new java.util.Scanner(System.in);
		System.out.print("请输入您的工资:");
		int gz = input.nextInt();
		int ss = 0;
		gz -= 3500;
		if (gz >= 0) {
			if (gz < 1500) {// 第一个等级 0.3 0
				ss = (int) (gz * 0.03f);
			} else {
				if (gz < 4500) {// 10 105
					ss = (int) (gz * 0.1f - 105);
				} else {
					if (gz < 9000) {// 20 555
						ss = (int) (gz * 0.2f - 555);
					} else {
						if (gz < 35000) {// 25 1005
							ss = (int) (gz * 0.25f - 1005);
						} else {
							if (gz < 55000) {// 30 2755
								ss = (int) (gz * 0.30f - 2755);
							} else {
								if (gz < 80000) {// 35 5505
									ss = (int) (gz * 0.35f - 5505);
								} else {
									ss = (int) (gz * 0.45f - 13505);
								}
							}
						}
					}
				}
			}
			System.out.println("您所有要交付的税务:" + ss + "元");
			System.out.println("剩下的工资:" + (gz+3500 - ss) + "元");
		} else {
			System.out.println("您的工资还不在个人所得税之内,加油！");
		}
		}
}

改进 if else

package com.kaige123.ifelse;
/**
* 凯哥
*/
public class TestIfElse {

	public static void main(String[] args) {

		java.util.Scanner input = new java.util.Scanner(System.in);
		System.out.print("请输入您的工资:");
		int gz = input.nextInt();
		int ss = 0;
		gz -= 3500;
		if (gz >= 0) {
			if (gz < 1500) {// 第一个等级 0.3 0
				ss = (int) (gz * 0.03f);
			} else if (gz < 4500) {// 10 105
				ss = (int) (gz * 0.1f - 105);
			} else if (gz < 9000) {// 20 555
				ss = (int) (gz * 0.2f - 555);
			} else if (gz < 35000) {// 25 1005
				ss = (int) (gz * 0.25f - 1005);
			} else if (gz < 55000) {// 30 2755
				ss = (int) (gz * 0.30f - 2755);
			} else if (gz < 80000) {// 35 5505
				ss = (int) (gz * 0.35f - 5505);
			} else {
				ss = (int) (gz * 0.45f - 13505);
			}
			System.out.println("您所有要交付的税务:" + ss + "元");
			System.out.println("剩下的工资:" + (gz + 3500 - ss) + "元");
		} else {
			System.out.println("您的工资还不在个人所得税之内,加油！");
		}
	}
}

个人所得税计算