diff --git a/compile-run-with-classpath/solution.sh b/compile-run-with-classpath/solution.sh
index 292074f..87561ab 100644
--- a/compile-run-with-classpath/solution.sh
+++ b/compile-run-with-classpath/solution.sh
@@ -7,3 +7,8 @@
 # First argument is blank: true
 # Second argument is blank: true
 # Third argument is blank: false
+#PATH=$PATH:"/mnt/c/Program Files/Java/jdk1.8.0_221/bin"
+#export PATH
+# echo $PATH
+javac -cp 'commons-lang3-3.9.jar' StringIsBlank.java
+java -cp 'commons-lang3-3.9.jar;.' StringIsBlank "" " " "*"
\ No newline at end of file
diff --git a/read-env-variable-system-property/solution.sh b/read-env-variable-system-property/solution.sh
index 1dfb638..731220f 100644
--- a/read-env-variable-system-property/solution.sh
+++ b/read-env-variable-system-property/solution.sh
@@ -6,3 +6,8 @@
 # 使得该java命令输出：
 # Environment variable AAA: $A;
 # System property BBB: '
+export AAA='$A;'
+demo="C:/Program Files/Java/jdk1.8.0_221/bin/"
+echo ${demo}javac
+${demo}javac ReadEnvironmentVariableAndSystemProperty.java
+${demo}java -DBBB=\' ReadEnvironmentVariableAndSystemProperty
\ No newline at end of file
diff --git a/system-out-system-err/solution.sh b/system-out-system-err/solution.sh
index 5cdeb2b..b9c3e34 100644
--- a/system-out-system-err/solution.sh
+++ b/system-out-system-err/solution.sh
@@ -2,3 +2,5 @@
 # 请在这里编写两条命令：
 # 1. 在当前目录中，使用javac命令编译PrintSystemOutSystemErr.java
 # 2. 在当前目录中，使用java命令运行PrintSystemOutSystemErr，使其标准输出和标准错误都重定向到当前目录下一个名为output.txt的文件中
+C:/Program Files/Java/jdk1.8.0_221/bin/javac PrintSystemOutSystemErr.java
+C:/Program Files/Java/jdk1.8.0_221/bin/javajava PrintSystemOutSystemErr 2>&1
\ No newline at end of file