import java.util.ArrayList;public class LXArrayList {    public static void main(String[] args) {        // TODO 自动生成的方法存根                ArrayList
     
       l = new ArrayList
      
       ();                l.add(123);                l.add(456);                l.add(789);                for(int i = 0; i < 11; i++)        {            l.add(i);        }                    System.out.println("列表中的元素有：" + l);                        System.out.print("列表中的元素有：");                for(int t : l)        {            System.out.print(" " + t);        }                System.out.print("\r" +"列表中的元素有：");                for(int i = 0; i < l.size();i++)        {            System.out.print(l.get(i) + " ");        }                        ArrayList
       
         sz = new ArrayList
        
         ();                sz.add(new Shu("樟树",15,20.5));                Shu ys = new Shu();                ys.setShuMIng("杨树");                ys.setGaoDu(13);                ys.setKuanDu(15.3);                sz.add(ys);                System.out.println();                for (int i = 0; i < sz.size();i++)        {            System.out.println(sz.get(i));        }                /* 输出结果如下：        列表中的元素有：[123, 456, 789, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]        列表中的元素有： 123 456 789 0 1 2 3 4 5 6 7 8 9 10        列表中的元素有：123 456 789 0 1 2 3 4 5 6 7 8 9 10         Shu [shuMIng=樟树, gaoDu=15, kuanDu=20.5]        Shu [shuMIng=杨树, gaoDu=13, kuanDu=15.3]        */                    }}
        
       
      
     

 

 

public class Shu {                        public Shu()     {        super();    }    public Shu(String shuMIng, int gaoDu, double kuanDu)     {        super();                this.shuMIng = shuMIng;                this.gaoDu = gaoDu;                this.kuanDu = kuanDu;    }        private String shuMIng;        private int gaoDu;        private double kuanDu;    public String getShuMIng() {        return shuMIng;    }    public void setShuMIng(String shuMIng) {        this.shuMIng = shuMIng;    }    public int getGaoDu() {        return gaoDu;    }    public void setGaoDu(int gaoDu) {        this.gaoDu = gaoDu;    }    public double getKuanDu() {        return kuanDu;    }    public void setKuanDu(double kuanDu) {        this.kuanDu = kuanDu;    }    @Override    public String toString() {        return "Shu [shuMIng=" + shuMIng + ", gaoDu=" + gaoDu + ", kuanDu=" + kuanDu + "]";    }            }