动态数组 博客分类： Java

 

看tomcat源码中StandardService类的addConnector()中有个动态的为数组增加数据方法

@Override
    public void addConnector(Connector connector) {
        synchronized (connectors) {
            connector.setService(this);
            Connector results[] = new Connector[connectors.length + 1];
            System.arraycopy(connectors, 0, results, 0, connectors.length);
            results[connectors.length] = connector;
            connectors = results;
       }
}

 所以我也模仿它自己实现了一个

public class DynamicArray {
	protected String strs[] = new String[0];
	public void addString( String connector ) {
		String results[] = new String[strs.length + 1];
		System.arraycopy(strs, 0, results, 0, strs.length);
		results[strs.length] = connector;
		strs = results;
	}

	@Test
	public void test() {
		System.out.println(Arrays.toString(strs));
		addString("1");
		System.out.println(Arrays.toString(strs));
		addString("2");
		System.out.println(Arrays.toString(strs));
		addString("2");
		System.out.println(Arrays.toString(strs));
	}
}