弱引用范例

class CustomRunnable implementw Runnable {

private WeakReference<String> mId;

public CustonRunnable(String id) {

this.mId = new WeakReference<String>(id);

}

@Override

public void run() {

String id = this.mId.get();

if (id != null) {

//TODO

}

}

}

软引用范例同上。

String str = "test";
SoftReference<String> softReference = new SoftReference<String>(str);
String str1 = softReference.get();

得到软引用str1,强引用str 无用