test.java

来自「JAVA培训用实用代码」· Java 代码 · 共 15 行

public final class Test{
	public static int totalNumber= 5 ;
	public final int id;
	
	public Test(){
		id = ++totalNumber;
	}
	public static void main(String[] args) {
		final Test t = new Test();
		final int i = 10;
		final int j;
		j = 20;
		//j = 30; //非法，对final变量进行二次赋值
	}
}