1 files changed, 36 insertions, 0 deletions
diff --git a/works/life/java-practice/javatest/src/javatest/p0404/Quadrangle.java b/works/life/java-practice/javatest/src/javatest/p0404/Quadrangle.java
new file mode 100644
index 0000000..c6b6630
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+++ b/works/life/java-practice/javatest/src/javatest/p0404/Quadrangle.java
@@ -0,0 +1,36 @@
+package javatest.p0404;
+
+public class Quadrangle {
+	// 实例化保存四边形对象的数组对象
+	private Quadrangle[] qtest = new Quadrangle[6];
+	private int nextIndex = 0;
+	
+	public void draw(Quadrangle q) { // 定义draw()方法，参数为四边形对象
+		if (nextIndex < qtest.length) {
+			qtest[nextIndex] = q;
+			System.out.println(nextIndex);
+			nextIndex++;
+		}
+	}
+	
+	public static void main(String[] args) {
+		// 实例化两个四边形对象，用于调用draw()方法
+		Quadrangle q = new Quadrangle();
+		q.draw(new Square()); // 以正方形对象为参数调用draw()方法
+		// 以平行四边形对象为参数调用draw()方法
+		q.draw(new Parallelogramgle());
+	}
+}
+
+class Square extends Quadrangle { // 定义一个正方形类，继承四边形类
+	public Square() {
+		System.out.println("正方形");
+	}
+}
+
+// 定义一个平行四边形类，继承四边形类
+class Parallelogramgle extends Quadrangle {
+	public Parallelogramgle() {
+		System.out.println("平行四边形");
+	}
+}