list.stream()基本应用

参考 ianly梁炎 url:https://blog.csdn.net/ianly123/article/details/82658622

1、String中某个字符出现次数：

    public static int strCount(String str,String findByStr){
        String[] split = str.split("");
        return Arrays.asList(split).stream().filter(s -> s.equals(findByStr)).collect(Collectors.toList()).size();
    }

2、List去除重复元素：

    public static List removeRepEle(List list){
        return list.stream().distinct().collect(Collectors.toList());
    }

eg:Object 对象

package com.ouyeel.platform.components.rzcore.foundation.service.csy.vo;
import java.io.Serializable;
/**Object对象*/
public class PaFlowInfo implements Serializable {
    private static final long serialVersionUID = 1L;
    private String serialNo;
    private String remark;
    public String getSerialNo() {
        return serialNo;
    }
    public void setSerialNo(String serialNo) {
        this.serialNo = serialNo;
    }
    public String getRemark() {
        return remark;
    }
    public void setRemark(String remark) {
        this.remark = remark;
    }
}

3、List