• 日期: 2026-11-07
  • 标签: 常规

import java.awt.; import java.awt.event.; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import javax.swing.*;

public class SubnetCalculator extends JFrame implements ActionListener { private static final long serialVersionUID = 1L;

private static JLabel ipLabel, subnetLabel, resultLabel, netmaskLabel, hostnumLabel, rangeLabel;
private static JTextField ipField, subnetField;
private static JButton calculateButton;

public static void main(String[] args) {
    new SubnetCalculator().setVisible(true);
}

public SubnetCalculator() {
    setTitle('子网计算器');
    setSize(500, 400);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setResizable(false);

    Container container = getContentPane();
    container.setLayout(new GridLayout(6, 2, 10, 10));

    ipLabel = new JLabel('IP地址(格式为：x1.x2.x3.x4)：');
    ipField = new JTextField(20);
    subnetLabel = new JLabel('子网数：');
    subnetField = new JTextField(20);
    resultLabel = new JLabel('');
    netmaskLabel = new JLabel('');
    hostnumLabel = new JLabel('');
    rangeLabel = new JLabel('');

    calculateButton = new JButton('计算');
    calculateButton.addActionListener(this);

    container.add(ipLabel);
    container.add(ipField);
    container.add(subnetLabel);
    container.add(subnetField);
    container.add(calculateButton);
    container.add(resultLabel);
    container.add(netmaskLabel);
    container.add(hostnumLabel);
    container.add(rangeLabel);

    setLocationRelativeTo(null);
}

@Override
public void actionPerformed(ActionEvent e) {
    String ip = ipField.getText();
    String subnet_num = subnetField.getText();
    try {
        int s = Integer.parseInt(subnet_num);
        int n = 0;
        int index1 = ip.indexOf('.');
        int x1 = Integer.parseInt(ip.substring(0, index1));
        int index2 = ip.indexOf('.', index1 + 1);
        int x2 = Integer.parseInt(ip.substring(index1 + 1, index2));
        int index3 = ip.indexOf('.', index2 + 1);
        int x3 = Integer.parseInt(ip.substring(index2 + 1, index3));

        if (x1 > 0 && x1 <= 126) {
            resultLabel.setText('本IP地址能划分划分的最大子网数为: ' + ((int) Math.pow(2, 24 - 2) - 2));
            if (s <= 128) {
                for (n = 1; (Math.pow(2, n) - 2) < s; n++) ;
                int sum = 0;
                for (int i = 0; i < n; i++) {
                    sum = sum + (int) Math.pow(2, (7 - i));
                }
                netmaskLabel.setText('子网掩码为：' + '255.' + sum + '.0.0');
                hostnumLabel.setText('每网段主机数：' + Math.pow(2, (32 - n)) + '台');
                if (n <= 8) {
                    for (int i = 1, sub_id = 0; i < Math.pow(2, n) - 1; i++) {
                        sub_id = (int) Math.pow(2, (8 - n)) * i;
                        rangeLabel.setText('各子网IP范围如下：

' + '<' + i + '>' + ' ' + x1 + '.' + sub_id + '.0.1' + '---' + x1 + '.' + (int) (sub_id + Math.pow(2, (8 - n)) - 2) + '.255.254'); } } else if (n > 8 && n <= 16) { int subnet_id = 0; for (int i = 0; i < Math.pow(2, 8); i++) { if (i == 0) { for (int k = 1, sub_id = 0; k <= Math.pow(2, n - 8) - 1; k++) { sub_id = (int) Math.pow(2, (16 - n)) * k; subnet_id++; rangeLabel.setText(rangeLabel.getText() + ' <' + subnet_id + '>' + ' ' + x1 + '.' + i + '.' + sub_id + '.1' + '------' + x1 + '.' + i + '.' + (sub_id + (int) Math.pow(2, (16 - n))) + '.254'); } } else { for (int k = 0, sub_id = 0; k <= Math.pow(2, n - 8) - 1; k++) { if (i == 255 && k == (Math.pow(2, n - 8) - 1)) { break; } sub_id = (int) Math.pow(2, (16 - n)) * k; subnet_id++; rangeLabel.setText(rangeLabel.getText() + ' <' + subnet_id + '>' + ' ' + x1 + '.' + i + '.' + sub_id + '.1' + '------' + x1 + '.' + i + '.' + (sub_id + (int) Math.pow(2, (16 - n))) + '.254'); } } } } else if (n > 16 && n < 24) { int subnet_id = 0; for (int m = 0; m < Math.pow(2, 8); m++) { if (m == 0) { for (int i = 0; i < Math.pow(2, 8); i++) { if (i == 0) { for (int k = 1, sub_id = 0; k <= Math.pow(2, n - 16) - 1; k++) { sub_id = (int) Math.pow(2, (24 - n)) * k; subnet_id++; rangeLabel.setText(rangeLabel.getText() + ' <' + subnet_id + '>' + ' ' + x1 + '.' + m + '.' + i + '.' + (sub_id + 1) + '------' + x1 + '.' + m + '.' + i + '.' + (sub_id + (int) Math.pow(2, (24 - n))) + '.254'); } } else { for (int k = 0, sub_id = 0; k <= Math.pow(2, n - 16) - 1; k++) { sub_id = (int) Math.pow(2, (24 - n)) * k; subnet_id++; rangeLabel.setText(rangeLabel.getText() + ' <' + subnet_id + '>' + ' ' + x1 + '.' + m + '.' + i + '.' + (sub_id + 1) + '------' + x1 + '.' + m + '.' + i + '.' + (sub_id + (int) Math.pow(2, (24 - n))) + '.254'); } } } } else { for (int i = 0; i < Math.pow(2, 8); i++) { for (int k = 0, sub_id = 0; k <= Math.pow(2, n - 16) - 1; k++) { if (m == 255 && (i == 255) && k == (Math.pow(2, n - 16) - 1)) { break; } sub_id = (int) Math.pow(2, (24 - n)) * k; subnet_id++; rangeLabel.setText(rangeLabel.getText() + ' <' + subnet_id + '>' + ' ' + x1 + '.' + m + '.' + i + '.' + (sub_id + 1) + '------' + x1 + '.' + m + '.' + i + '.' + (sub_id + (int) Math.pow(2, (24 - n))) + '.254'); } } } } } } else { resultLabel.setText('输入的子网数超出范围。'); } } else if (x1 >= 128 && x1 <= 191) { resultLabel.setText('本IP地址能划分划分的最大子网数为: ' + ((int) Math.pow(2, 16 - 2) - 2)); if (s <= 256) { for (n = 1; (Math.pow(2, n) - 2) < s; n++) ; int sum = 0; for (int i = 0; i < n; i++) { sum = sum + (int) Math.pow(2, (7 - i)); } netmaskLabel.setText('子网掩码为：' + '255.255.' + sum + '.0'); hostnumLabel.setText('每网段主机数：' + Math.pow(2, (16 - n)) + '台'); if (n <= 8) { for (int i = 1, sub_id = 0; i < Math.pow(2, n) - 1; i++) { sub_id = (int) Math.pow(2, (8 - n)) * i; rangeLabel.setText('各子网IP范围如下： ' + '<' + i + '>' + ' ' + x1 + '.' + x2 + '.' + sub_id + '.1' + '---' + x1 + '.' + x2 + '.' + (int) (sub_id + Math.pow(2, (8 - n)) - 2) + '.255.254'); } } else if (n > 8 && n < 16) { int subnet_id = 0; for (int i = 0; i < Math.pow(2, 8); i++) { if (i == 0) { for (int k = 1, sub_id = 0; k <= Math.pow(2, n - 8) - 1; k++) { sub_id = (int) Math.pow(2, (16 - n)) * k; subnet_id++; rangeLabel.setText(rangeLabel.getText() + ' <' + subnet_id + '>' + ' ' + x1 + '.' + x2 + '.' + i + '.' + (sub_id + 1) + '------' + x1 + '.' + x2 + '.' + i + '.' + (sub_id + (int) Math.pow(2, (16 - n))) + '.254'); } } else { for (int k = 0, sub_id = 0; k <= Math.pow(2, n - 8) - 1; k++) { if ((i == 255) && k == (Math.pow(2, n - 8) - 1)) { break; } sub_id = (int) Math.pow(2, (16 - n)) * k; subnet_id++; rangeLabel.setText(rangeLabel.getText() + ' <' + subnet_id + '>' + ' ' + x1 + '.' + x2 + '.' + i + '.' + (sub_id + 1) + '------' + x1 + '.' + x2 + '.' + i + '.' + (sub_id + (int) Math.pow(2, (16 - n))) + '.254'); } } } } } else { resultLabel.setText('输入的子网数超出范围。'); } } else if (x1 >= 192 && x1 <= 223) { resultLabel.setText('本IP地址能划分划分的最大子网数为: ' + ((int) Math.pow(2, 8 - 2) - 2)); if (s <= 256) { for (n = 1; (Math.pow(2, n) - 2) < s; n++) ; int sum = 0; for (int i = 0; i < n; i++) { sum = sum + (int) Math.pow(2, (7 - i)); } netmaskLabel.setText('子网掩码为：' + '255.255.255.' + sum); hostnumLabel.setText('每网段主机数：' + Math.pow(2, (8 - n)) + '台'); for (int i = 1, sub_id = 0; i < Math.pow(2, n) - 1; i++) { sub_id = (int) Math.pow(2, (8 - n)) * i; rangeLabel.setText('各子网IP范围如下： ' + '<' + i + '>' + ' ' + x1 + '.' + x2 + '.' + x3 + '.' + (sub_id + 1) + '---' + x1 + '.' + x2 + '.' + x3 + '.' + ((int) sub_id + Math.pow(2, (8 - n)) - 2)); } } else { resultLabel.setText('输入的子网数超出范围。'); } } } catch (NumberFormatException ex) { resultLabel.setText('请检查输入的IP地址和子网数格式。'); } } }

子网计算器：Java代码实现IP地址子网划分功能

原文地址: https://www.cveoy.top/t/topic/ocv3 著作权归作者所有。请勿转载和采集!

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