Java 5.0 ·ºÐÍÖ® ͨ¹ý·ºÐÍ·½·¨·µ»Ø·ºÐÍÀàÐÍ

package Demo;
// ͨ¹ý·ºÐÍ·½·¨·µ»Ø·ºÐÍÀàÐÍ
class Info27<T extends Number> { // Ö¸¶¨ÉÏÏÞ£¬Ö»ÄÜÊÇÊý×ÖÀàÐÍ
private T var; // ´ËÀàÐÍÓÉÍⲿ¾ö¶¨
public T getVar() {
return this.var;
}
public void setVar(T var) {
this.var = var;
}
public String toString() { // ¸²Ð´ObjectÀàÖеÄtoString()·½·¨
return this.var.toString();
}
}
public class GenericsDemo27 {
public static void main(String args[]) {
Info27<Integer> i = fun(30);
System.out.println("Value Of Number : " + i.getVar());
}
public static <T extends Number> Info27<T> fun(T param) { // ·½·¨Öд«Èë»ò·µ»ØµÄ·ºÐÍÀàÐÍÓɵ÷Ó÷½·¨Ê±ËùÉèÖõIJÎÊýÀàÐ;ö¶¨
Info27<T> temp = new Info27<T>(); // ¸ù¾Ý´«ÈëµÄÊý¾ÝÀàÐÍʵÀý»¯Info
temp.setVar(param); // ½«´«µÝµÄÄÚÈÝÉèÖõ½Info¶ÔÏóµÄvarÊôÐÔÖ®ÖÐ
return temp; // ·µ»ØʵÀý»¯¶ÔÏó
}
}