diff --git a/ShapeAreaCalculator/Circle.java b/w4/Circle.java
similarity index 100%
rename from ShapeAreaCalculator/Circle.java
rename to w4/Circle.java
diff --git a/ShapeAreaCalculator/Main.java b/w4/Main.java
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rename from ShapeAreaCalculator/Main.java
rename to w4/Main.java
diff --git a/ShapeAreaCalculator/Rectangle.java b/w4/Rectangle.java
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rename from ShapeAreaCalculator/Rectangle.java
rename to w4/Rectangle.java
diff --git a/ShapeAreaCalculator/Shape.java b/w4/Shape.java
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rename from ShapeAreaCalculator/Shape.java
rename to w4/Shape.java
diff --git a/ShapeAreaCalculator/ShapeUtil.java b/w4/ShapeUtil.java
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rename from ShapeAreaCalculator/ShapeUtil.java
rename to w4/ShapeUtil.java
diff --git a/ShapeAreaCalculator/Triangle.java b/w4/Triangle.java
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rename from ShapeAreaCalculator/Triangle.java
rename to w4/Triangle.java
diff --git a/实验报告.md b/w4/实验报告.md
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rename from 实验报告.md
rename to w4/实验报告.md
diff --git a/类图.puml b/w4/类图.puml
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rename from 类图.puml
rename to w4/类图.puml