protected void startThreads() {
		if (this.readThread != null) {
			this.readThread.start();
		}
		if (this.sortThread != null) {
			this.sortThread.start();
		}
		if (this.spillThread != null) {
			this.spillThread.start();
		}
	}
protected void startThreads ( ) { if ( this . readThread != null ) { this . readThread . start ( ) ; } if ( this . sortThread != null ) { this . sortThread . start ( ) ; } if ( this . spillThread != null ) { this . spillThread . start ( ) ; } }
Starts all the threads that are used by this sort-merger.