From c2e95f6c25b2c3f9ff61dc0891cc08360b676bb1 Mon Sep 17 00:00:00 2001
From: dam <1782067308@qq.com>
Date: Sun, 26 Jan 2025 12:08:15 +0800
Subject: [PATCH] =?UTF-8?q?108=E5=86=97=E4=BD=99=E8=BF=9E=E6=8E=A5=20java?=
 =?UTF-8?q?=E5=AE=9E=E7=8E=B0?=
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Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 problems/kamacoder/0108.冗余连接.md | 75 +++++++++++++++++++++++++
 1 file changed, 75 insertions(+)

diff --git a/problems/kamacoder/0108.冗余连接.md b/problems/kamacoder/0108.冗余连接.md
index efbbb6d2..df3dd4de 100644
--- a/problems/kamacoder/0108.冗余连接.md
+++ b/problems/kamacoder/0108.冗余连接.md
@@ -176,6 +176,81 @@ int main() {
 
 ### Java 
 
+```java
+import java.util.Scanner;
+
+public class Main {
+    private static int[] father;
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        int pointNum = scanner.nextInt();
+        father = new int[pointNum + 1];
+        init();
+        for (int i = 0; i < pointNum; i++) {
+            join(scanner.nextInt(), scanner.nextInt());
+        }
+    }
+
+    /**
+     * 并查集初始化
+     */
+    private static void init() {
+        for (int i = 1; i < father.length; i++) {
+            // 让每个元素指向自己
+            father[i] = i;
+        }
+    }
+
+    /**
+     * 并查集寻根
+     *
+     * @param u
+     * @return
+     */
+    private static int find(int u) {
+        // 判断 u 是否等于自己，如果是的话，直接返回自己
+        // 如果不等于自己，就寻找根，寻找的时候，反复进行路径压缩
+        return u == father[u] ? u : (father[u] = find(father[u]));
+    }
+
+    /**
+     * 判断 u 和 v 是否同根
+     *
+     * @param u
+     * @param v
+     * @return
+     */
+    private static boolean isSame(int u, int v) {
+        return find(u) == find(v);
+    }
+
+    /**
+     * 添加 边 到并查集，v 指向 u
+     *
+     * @param u
+     * @param v
+     */
+    private static void join(int u, int v) {
+        // --if-- 如果两个点已经同根，说明他们的信息已经存储到并查集中了，直接返回即可
+        // 寻找u的根
+        int uRoot = find(u);
+        // 寻找v的根
+        int vRoot = find(v);
+        if (uRoot == vRoot) {
+            // --if-- 如果u,v的根相同，说明两者已经连接了，直接输出
+            System.out.println(u + " " + v);
+            return;
+        }
+        // --if-- 将信息添加到并查集
+        father[vRoot] = uRoot;
+    }
+
+}
+```
+
+
+
 ### Python
 
 ```python