1 files changed, 70 insertions, 0 deletions
diff --git a/works/life/java-practice/javatest/src/javatest/p0502/Road.java b/works/life/java-practice/javatest/src/javatest/p0502/Road.java
new file mode 100644
index 0000000..7731494
--- /dev/null
+++ b/works/life/java-practice/javatest/src/javatest/p0502/Road.java
@@ -0,0 +1,70 @@
+package javatest.p0502;
+
+interface ComputerWeight {
+	public double computeWeight();
+}
+
+class Television implements ComputerWeight {
+	public double computeWeight() {
+		return 45.5;
+	}
+	// 实现computeWeight()方法。
+}
+
+class Computer implements ComputerWeight {
+	public double computeWeight() {
+		return 65.5;
+	}
+	// 实现computeWeight()方法。
+}
+
+class WashMachine implements ComputerWeight {
+	public double computeWeight() {
+		return 145;
+	}
+	// 实现computeWeight()方法。
+}
+
+class Car {
+	ComputerWeight[] goods;
+	double totalWeights = 0;
+
+	Car(ComputerWeight[] goods) {
+		this.goods = goods;
+	}
+
+	public double getTotalWeights() {
+		totalWeights = 0;
+		for (int k = 0; k < goods.length; k++) {
+			totalWeights = totalWeights + goods[k].computeWeight();
+		}
+		// 计算totalWeights
+		return totalWeights;
+	}
+}
+
+public class Road {
+	public static void main(String args[]) {
+		ComputerWeight[] goodsOne = new ComputerWeight[50], goodsTwo = new ComputerWeight[22];
+		for (int i = 0; i < goodsOne.length; i++) {
+			if (i % 3 == 0)
+				goodsOne[i] = new Television();
+			else if (i % 3 == 1)
+				goodsOne[i] = new Computer();
+			else if (i % 3 == 2)
+				goodsOne[i] = new WashMachine();
+		}
+		for (int i = 0; i < goodsTwo.length; i++) {
+			if (i % 3 == 0)
+				goodsTwo[i] = new Television();
+			else if (i % 3 == 1)
+				goodsTwo[i] = new Computer();
+			else if (i % 3 == 2)
+				goodsTwo[i] = new WashMachine();
+		}
+		Car 大货车 = new Car(goodsOne);
+		System.out.println("大货车装载的货物重量:" + 大货车.getTotalWeights());
+		Car 小货车 = new Car(goodsTwo);
+		System.out.println("小货车装载的货物重量:" + 小货车.getTotalWeights());
+	}
+}