Java 同步塊：鎖定塊直到 object 實例化

Question

我想同步我的代碼塊並僅在實例化 object 連接時釋放它，我該怎么做？

public void myMethod() {

 Connection connection = null;

 synchronized (connection) {
 // Set configuration, block of code to synchronize
 }

 connection = getConnection(configuration); // Should be released after this
}

Answer 1

使用一個單獨的東西作為你的顯示器：

private final Object myMethodLock = new Object();

public void myMethod() {

 Connection connection = null;

 synchronized (myMethodLock) {
   connection = getConnection(configuration);
 }

 // myMethodLock has been released.
}