package com.xp.java;

import java.util.ArrayList;

import java.util.List;

//一些java 面试题

public class TestInterview {

static class ValHold {

public int i = 10;

}

public void amethod() {

int i = 99;

ValHold v = new ValHold();

v.i = 30;

another(v, i);

System.out.println(v.i);

}

public void another(ValHold v, int i) {

i = 0;

v.i = 20;

ValHold vh = new ValHold();

v = vh;

System.out.println(v.i + "" + i);

}

//字符串考察

public static void testConcat() {

String product = "Pen";

product.toLowerCase();

product.concat(" BOX".toLowerCase());

System.out.println(product);

System.out.println(product.substring(4, 6));

}

public static int weiSum() {

int a = 4;

int result = a++ + 4 << 2;

return result;

}

public static String fun(String s) {

return s.length() < 0 ? (fun(s.substring(1) + s.charAt(0))) : "";

}

//考察 集合删除

public static void listRemove() {

List<String> dataList = new ArrayList<>();

dataList.add("a");

dataList.add("b");

dataList.add("c");

dataList.add("d");

dataList.add("e");

for (int i = 0; i < dataList.size(); i++) {

String data = dataList.get(i);

System.out.print("i = " + i);

System.out.println(" data = " + data);

if ("c".equals(data) || "d".equals(data)) {

dataList.remove(data);

}

}

System.out.println("dataList = " + dataList);

}

public static void main(String[] args) {

// TestInterview outer = new TestInterview();

// outer.amethod();

// testConcat();

// System.out.println(weiSum());

listRemove();

}

}