Runtime.getRuntime().gc();

[lchad]

下面是 System.gc() 的实现 Brrrrr...

public static void gc() {
        boolean shouldRunGC;
        synchronized (LOCK) {
            shouldRunGC = justRanFinalization;
            if (shouldRunGC) {
                justRanFinalization = false;
            } else {
                runGC = true;
            }
        }
        if (shouldRunGC) {
            Runtime.getRuntime().gc();
        }
    }

所以根本不存在谁比谁可靠一说