java中String数组和List的互相转化

目的:在java中,实现String数据转List,List转String数组

1.ListString数组

方法一:

//先准备一个List
List testList=new ArrayList<>();
testList.add("a");
testList.add("b");
testList.add("c");
//List转String
String[] strs1=testList.toArray(new String[testList.size()]);
for(String s:strs1){
   System.out.println(s);
}

方法二:

//先准备一个List
List testList=new ArrayList<>();
testList.add("a");
testList.add("b");
testList.add("c");
//List转String
String[] strs2 = new String[testList.size()];
for(int i=0;i

二:String数据转List

方法一:


//准备一个String数组
String[] strs = {"aa","bb","cc"};
//String数组转List
List strsToList1= Arrays.asList(strs);
for(String s:strsToList1){
 System.out.println(s);
}


方法二:

//准备一个String数组
String[] strs = {"aa","bb","cc"};
//String数组转List
List strsToList2=new ArrayList<>();
Collections.addAll(strsToList2,strs);
for(String s:strsToList2){
   System.out.println(s);
}


方法三:

//准备一个String数组
String[] strs = {"aa","bb","cc"};
//String数组转List
List strsToList3=new ArrayList<>();
for(String s:strs){
    strsToList3.add(s);
}
for(String s:strsToList3){
    System.out.println(s);
}


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