Java 中的 CopyOnWriteArrayList toString()方法
原文:https://www . geesforgeks . org/copy onwriterarraylist-tostring-method-in-Java/
语法:
public String toString()
参数:函数不接受任何参数。
返回值:函数返回列表的字符串表示形式。
以下程序说明了上述功能:
程序 1:
// Java Program to illustrate the CopyOnWriteArrayList
// toString() 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<Integer> ArrLis
= new CopyOnWriteArrayList<Integer>();
// Add elements
ArrLis.add(32);
ArrLis.add(67);
ArrLis.add(98);
ArrLis.add(100);
// print CopyOnWriteArrayList
System.out.println("CopyOnWriteArrayList: "
+ ArrLis);
System.out.println("ArrLis converted to string: "
+ ArrLis.toString());
}
}
输出:
CopyOnWriteArrayList: [32, 67, 98, 100]
ArrLis converted to string: [32, 67, 98, 100]
程序二:
// Java Program to illustrate the CopyOnWriteArrayList
// toString()() 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<String> ArrLis
= new CopyOnWriteArrayList<String>();
// Add elements
ArrLis.add("gopal");
ArrLis.add("gfg");
ArrLis.add("jgec");
ArrLis.add("sudo");
// print CopyOnWriteArrayList
System.out.println("CopyOnWriteArrayList: " + ArrLis);
System.out.println("ArrLis converted to string: "
+ ArrLis.toString());
}
}
输出:
CopyOnWriteArrayList: [gopal, gfg, jgec, sudo]
ArrLis converted to string: [gopal, gfg, jgec, sudo]
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