main.java

来自「<设计模式-Java语言中的应用> 的源码」· Java 代码 · 共 22 行

public class Main {
    private static BigString[] bsarray = new BigString[1000];
    public static void main(String[] args) {
        System.out.println("共享时：");
        testAllocation(true);
        System.out.println("不共享时：");
        testAllocation(false);
    }
    public static void testAllocation(boolean shared) {
        for (int i = 0; i < bsarray.length; i++) {
            bsarray[i] = new BigString("1212123", shared);
        }
        showMemory();
    }
    public static void showMemory() {
        Runtime.getRuntime().gc();
        long used = Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory();
        System.out.println("内存使用量= " + used);
    }
}