經(jīng)常我們會(huì)遇到前端傳服務(wù)端值為數(shù)組的時(shí)候我們需要對(duì)其轉(zhuǎn)換成集合便于一些其它操作，刪除，匹配等操作，今天我們就總結(jié)下數(shù)組集合相互轉(zhuǎn)換的方法文章來(lái)源地址http://www.zghlxwxcb.cn/news/detail-800978.html
1、Object[] objArray = arrayList.toArray();
@Slf4j
public class BaseTest {
@Test
public void listToArray() {
ArrayList list = new ArrayList();
list.add("aa");
list.add("cc");
list.add("dd");
Object[] objArray = list.toArray();
for (int i = 0; i < objArray.length; i++) {
System.out.println(objArray[i]);
}
}
}2、String[] strArray = new String[list.size()];
@Slf4j
public class BaseTest {
@Test
public void listToArray() {
List<String> list = new ArrayList<>();
list.add("aa");
list.add("cc");
list.add("dd");
String[] strArray= new String[list.size()];
list.toArray(strArray);
for (String str : strArray) {
System.out.println(str);
}
}
}3、String[] strArray = list.toArray(new String[list.size()]);
@Slf4j
public class BaseTest {
@Test
public void listToArray() {
List<String> list = new ArrayList<>();
list.add("aa");
list.add("cc");
list.add("dd");
String[] strArray = list.toArray(new String[list.size()]);
for (int i = 0; i < strArray.length; i++) {
System.out.println(strArray[i]);
}
}
}?4、Object[] objArray = list.stream().toArray();
@Slf4j
public class BaseTest {
@Test
public void listToArray() {
List<String> list = new ArrayList<>();
list.add("aa");
list.add("cc");
list.add("dd");
Object[] objArray = list.stream().toArray();
for (Object object : objArray) {
System.out.println(objArray);
}
}
}5、String[] strArray = list.stream().toArray(String[]::new);
@Slf4j
public class BaseTest {
@Test
public void listToArray() {
List<String> list = new ArrayList<>();
list.add("aa");
list.add("cc");
list.add("dd");
String[] strArray = list.stream().toArray(String[]::new);
for (String str : strArray) {
System.out.println(sstr);
}
}
}文章來(lái)源：http://www.zghlxwxcb.cn/news/detail-800978.html
到了這里，關(guān)于Java：List相互轉(zhuǎn)換數(shù)組的文章就介紹完了。如果您還想了解更多內(nèi)容，請(qǐng)?jiān)谟疑辖撬阉鱐OY模板網(wǎng)以前的文章或繼續(xù)瀏覽下面的相關(guān)文章，希望大家以后多多支持TOY模板網(wǎng)！
