JAVA中String分割为数组 String str ="a b c d e f" 期待结果：✀a b✀✀c d✀✀e f✀

import java.util.Arrays;
public class Test{     
    public static void main(String[] args){
        String str ="a b            c d                       ef";
        String a[]=str.split("\\s{2,}");
        System.out.println(Arrays.toString(a));
    }
}

[a b, c d, ef]

package com.isoftstone.baidu;
public class DrawDemo {
    public static void main(String[] args) {
        String str = "a b            c d                       ef";
        subStringMethod(str);
    }
       
    public static void subStringMethod(String str) {
        String[] tempValue = str.split("  ");
        for(int i = 0; i < tempValue.length; i++) {
            if(!tempValue[i].trim().equals(""))
                System.out.print(tempValue[i] + "\t");
        }
    }
}

substring(0, 3)