public class Num { public static void main(String[] args) { // TODO Auto-generated method stub double i=Math.random()*200; Double j=new Double(i); System.out.println("num="+j.intValue()); }}
import java.util.ArrayList; import java.util.List;public class RadomArrarOut { /** * @param args * @return */ public static void main(String[] args) { // TODO Auto-generated method stub
Object[] intTest = { "1", "2", "3", "4", "5" };
List list = new ArrayList(); for (int i = 0; i < intTest.length; i++) { list.add(i, intTest[i]); } for (int i = 0; i < intTest.length; i++) { double random = Math.random(); int temp = (int) (random * (intTest.length - i));
import java.util.ArrayList; import java.util.List;public class RadomArrarOut { /** * @param args * @return */ public static void main(String[] args) { // TODO Auto-generated method stub
Object[] intTest = new Object[100]; int value=100; for(int i=0;i<100;i++){
intTest[i]=value+i; System.out.println(intTest[i]); } List list = new ArrayList(); for (int i = 0; i < intTest.length; i++) { list.add(i, intTest[i]); } for (int i = 0; i < intTest.length; i++) { double random = Math.random(); int temp = (int) (random * (intTest.length - i));
List<Integer> list = new ArrayList<Integer>(); for(int i = 100; i <= 200; i++) list.add(i); Collections.shuffle(list); System.out.println(list);
public static void main(String args[]) { List list = new ArrayList(); for (int i = 100; i <= 200; i++) list.add(i+""); Collections.shuffle(list); System.out.println(list); }
int [] arrayInt=new int[100]; for(int i=0;i<101;i++){ arrayInt[i]=i+100; }for(int i=101;i>1;i++){ int getX=new Random().nextInt(i); int temp=array[i-1]; arrayInt[i-1]=arrayInt[getX]; arrayInt[getX]=temp; } for(int i=0;i<101;i++) System.out.println(arrayInt[i]);
public static void main(String[] args) {
// TODO Auto-generated method stub
double i=Math.random()*200;
Double j=new Double(i);
System.out.println("num="+j.intValue());
}}
import java.util.List;public class RadomArrarOut { /**
* @param args
* @return
*/ public static void main(String[] args) {
// TODO Auto-generated method stub
Object[] intTest = { "1", "2", "3", "4", "5" };
List list = new ArrayList();
for (int i = 0; i < intTest.length; i++) {
list.add(i, intTest[i]);
} for (int i = 0; i < intTest.length; i++) {
double random = Math.random();
int temp = (int) (random * (intTest.length - i));
System.out.println(list.get(temp));
list.remove(temp); }
}
}
import java.util.List;public class RadomArrarOut { /**
* @param args
* @return
*/ public static void main(String[] args) {
// TODO Auto-generated method stub
Object[] intTest = new Object[100];
int value=100;
for(int i=0;i<100;i++){
intTest[i]=value+i;
System.out.println(intTest[i]);
}
List list = new ArrayList();
for (int i = 0; i < intTest.length; i++) {
list.add(i, intTest[i]);
} for (int i = 0; i < intTest.length; i++) {
double random = Math.random();
int temp = (int) (random * (intTest.length - i));
System.out.println(list.get(temp));
list.remove(temp); }
System.out.println("====result===="+intTest.length);
}
}
还是把你写全了吧,你自己看看。
for(int i = 100; i <= 200; i++)
list.add(i);
Collections.shuffle(list);
System.out.println(list);
List list = new ArrayList();
for (int i = 100; i <= 200; i++)
list.add(i+"");
Collections.shuffle(list);
System.out.println(list);
}
for(int i=0;i<101;i++){
arrayInt[i]=i+100;
}for(int i=101;i>1;i++){
int getX=new Random().nextInt(i);
int temp=array[i-1];
arrayInt[i-1]=arrayInt[getX];
arrayInt[getX]=temp;
}
for(int i=0;i<101;i++)
System.out.println(arrayInt[i]);