添加
ArrayList<String> a = new ArrayList<String>(); a.add("CSDN_SEU_Cavin"); Class c = a.getClass(); try{ Method method = c.getMethod("add",Object.class); method.invoke(a,100); System.out.println("lgqname:" +a); }catch(Exception e){ e.printStackTrace(); }
结果
lgqname:[CSDN_SEU_Cavin, 100]
或者
List list = new ArrayList(); list.add("CSDN_SEU_Cavin"); list.add(100);
泛型类、
public static class FX<T> { private T ob; // 定义泛型成员变量 public FX(T ob) { this.ob = ob; } public T getOb() { return ob; } public void showTyep() { System.out.println("T的实际类型是: " + ob.getClass().getName()); } }
非泛型类
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public static class FX { private Object ob; // 定义泛型成员变量 public FX(Object ob) { this.ob = ob; } public Object getOb() { return ob; } public void showTyep() { System.out.println("T的实际类型是: " + ob.getClass().getName()); } }