Java中的 CopyOnWriteArrayList hashCode() 方法
CopyOnWriteArrayList的hashCode()方法返回列表的 hashCode 值。
句法:
public int hashCode()
参数:该函数不接受任何参数。
返回值:函数返回列表的hashCode值。
下面的程序说明了上述函数:
方案一:
// Java Program to illustrate the CopyOnWriteArrayList
// hashCode() method in Java
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// create object of CopyOnWriteArrayList
CopyOnWriteArrayList ArrLis
= new CopyOnWriteArrayList();
// Add elements
ArrLis.add(32);
ArrLis.add(67);
ArrLis.add(98);
ArrLis.add(100);
// print CopyOnWriteArrayList
System.out.println("CopyOnWriteArrayList: "
+ ArrLis);
// hashCode value print
System.out.println("hashCode value: "
+ ArrLis.hashCode());
}
}
输出:
CopyOnWriteArrayList: [32, 67, 98, 100]
hashCode value: 1944358
方案二:
// Java Program to illustrate the CopyOnWriteArrayList
// hashCode() method in Java
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// create object of CopyOnWriteArrayList
CopyOnWriteArrayList ArrLis
= new CopyOnWriteArrayList();
// Add elements
ArrLis.add("gopal");
ArrLis.add("gfg");
ArrLis.add("jgec");
ArrLis.add("sudo");
// print CopyOnWriteArrayList
System.out.println("CopyOnWriteArrayList: "
+ ArrLis);
// hashCode value print
System.out.println("hashCode value: "
+ ArrLis.hashCode());
}
}
输出:
CopyOnWriteArrayList: [gopal, gfg, jgec, sudo]
hashCode value: -1942417272
参考: https: Java/util/concurrent/CopyOnWriteArrayList.html#hashCode–