package Demo; public class Demo1 { public static void main(String[] args) { Single s=Single.getInstanceof(); Single s1=Single.getInstanceof(); s.setName("liliang"); String d=s1.getName(); System.out.print(d); } } class Single { private String name; public String getName() { return name; } public void setName(String name) { this.name = name; } public static Single getS() { return s; } public static void setS(Single s) { Single.s = s; } private static Single s=new Single(); private Single(){} public static Single getInstanceof() { return s; } }