From 464b18be9d19caaf50a21fe43b81d7c103e30424 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Sat, 16 May 2026 14:37:02 +0800
Subject: [PATCH] =?UTF-8?q?day08-=E5=B8=B8=E7=94=A8=E7=B1=BB-String-?=
 =?UTF-8?q?=E7=9A=84=E8=BD=AC=E6=8D=A2=E6=96=B9=E6=B3=95=5Freplace=5FtoCha?=
 =?UTF-8?q?rArray=5FgetBytes?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 day08/src/com/inmind/string01/Demo06.java | 39 +++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 day08/src/com/inmind/string01/Demo06.java

diff --git a/day08/src/com/inmind/string01/Demo06.java b/day08/src/com/inmind/string01/Demo06.java
new file mode 100644
index 0000000..28fc56d
--- /dev/null
+++ b/day08/src/com/inmind/string01/Demo06.java
@@ -0,0 +1,39 @@
+package com.inmind.string01;
+/*
+常用类_String的转换方法_replace_toCharArray_getBytes
+
+public char[] toCharArray () ：将此字符串转换为新的字符数组。
+public byte[] getBytes () ：使用平台的默认字符集将该 String编码转换为新的字节数组。
+public String replace (CharSequence target, CharSequence replacement) ：将与target匹配的字符串使
+用replacement字符串替换。
+ */
+public class Demo06 {
+    public static void main(String[] args) {
+        //public String replace (CharSequence target, CharSequence replacement)
+        String str = "今天，天气很好，我很开心";
+        //要求：将所有的“天”，替换为“*”
+        String replaceStr = str.replace("天", "***");
+        System.out.println(replaceStr);
+    }
+
+    public static void method2(String[] args) {
+        //作用：将字符串转为字节数组数据
+        //public byte[] getBytes () ：使用平台的默认字符集将该 String编码转换为新的字节数组。
+        String s = "123";
+        byte[] bytes = s.getBytes();
+        System.out.println(bytes);
+        //只能遍历数组，一一打印
+        for (int i = 0; i < bytes.length; i++) {
+            byte b = bytes[i];
+            System.out.println(b);
+        }
+    }
+
+    public static void method1(String[] args) {
+        //public char[] toCharArray () ：将此字符串转换为新的字符数组。
+        String s = "hello";
+        //作用：字符串转为字符数组
+        char[] chars = s.toCharArray();
+        System.out.println(chars);//注意：chars保存的是地址，打印方法，底层实现，将该地址的内容
+    }
+}