数组里的值放到另一个数组中,并转大写
1,方式一 (简单比较常见)
public static void test1(){
String[] strings1 = new String[]{"hello","world","wd","asd"};
String[] strings2 = new String[strings1.length];
for (int i = 0; i < strings1.length; i++) {
strings2[i] = strings1[i].toUpperCase();
}
for (String s : strings2) {
System.out.println(s);
}
}
方式2 转集合后再转进行操作
static int i = 0;
public static void test1(){
String[] strings1 = new String[]{"hello","world","wd","asd"};
String[] strings2 = new String[strings1.length];
Arrays.stream(strings1).collect(Collectors.toList()).forEach(s -> {
strings2[i++] = s.toUpperCase();
});
}