如何在Java中将List字符串转换为大写？
首先创建一个List字符串：
List<String> list = Arrays.asList("David", "Tom", "Ken","Yuvraj", "Gayle");现在将上面的列表转换为大写：
list.stream().map(players -> players.toUpperCase())
要显示，请使用forEach()：
list.stream().map(players -> players.toUpperCase()) .forEach(players -> System.out.print(players + ""));
下面是将列表字符串转换为大写的示例：
示例
import java.util.Arrays;
import java.util.List;
public class Demo {
public static void main(final String[] args) {
List<String> list = Arrays.asList("David", "Tom", "Ken","Yuvraj", "Gayle");
System.out.print("List = "+list);
System.out.print("\nUppercase strings = ");
list.stream().map(players -> players.toUpperCase()) .forEach(players -> System.out.print(players + ""));
}
}输出结果
List = [David, Tom, Ken, Yuvraj, Gayle] Uppercase strings = DAVID TOM KEN YUVRAJ GAYLE