List removeAll(Collection c)

List removeAll(Collection c)

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import java.util. * ; public class ListRemoveAllTest { public static void main( String [] args) { // list.removeAll 예제 List orgList = new ArrayList(); orgList. add ( "AA" ); orgList. add ( "BB" ); orgList. add ( "CC" ); orgList. add ( "AA" ); List list = new ArrayList(); list. add ( "CC" ); list. add ( "CC" ); list. add ( "AA" ); System . out . println ( "=======BEFORE============" ); for ( String item : orgList) { System . out . println (item); } orgList.removeAll(list); System . out . println ( "=======AFTER============" ); for ( String item : orgList) { System . out . println (item); } // list.removeAll 예제 UserVo vo; List voOrgList = new ArrayList(); vo = new UserVo( "Mike" , 35 , "서울" ); voOrgList. add (vo); vo = new UserVo( "Tom" , 35 , "김해" ); voOrgList. add (vo); vo = new UserVo( "Tom" , 99 , "김해" ); voOrgList. add (vo); vo = new UserVo( "Bit" , 35 , "서울" ); voOrgList. add (vo); List voList = new ArrayList(); vo = new UserVo( "Mike" , 35 , "서울" ); voList. add (vo); vo = new UserVo( "Tom" , 35 , "김해" ); voList. add (vo); System . out . println ( "=======BEFORE============" ); for (UserVo item : voOrgList) { System . out . println (item. toString ()); } //removeAll -> batchRemove -> contains -> equlas voOrgList.removeAll(voList); System . out . println ( "=======AFTER============" ); for (UserVo item : voOrgList) { System . out . println (item. toString ()); } } } class UserVo { private String name; private int age; private String address; UserVo( String name, int age, String address){ this .name = name; this .age = age; this .address = address; } public String getName() { return name; } public void setName( String name) { this .name = name; } public int getAge() { return age; } public void setAge( int age) { this .age = age; } public String getAddress() { return address; } public void setAddress( String address) { this .address = address; } @Override public String toString () { return "UserVo [name=" + name + " , Age = " + age + ", address=" + address + "]" ; } @Override public boolean equals (Object anObject) { if ( ! (anObject instanceof UserVo)) { return false ; } UserVo otherMember = (UserVo)anObject; return (otherMember.getName(). equals (getName()) & & otherMember.getAge() = = getAge() & & otherMember.getAddress(). equals (getAddress())); } Colored by Color Scripter

from http://devhj.tistory.com/19 by ccl(A) rewrite - 2021-12-03 16:27:18