How to extract JAVA object attribute into an 1 dimensional array

Question

In JAVA, how can I get a 1 dimensional array of pogNumber based on the this arrayList?

List<PogProdData> list = new ArrayList<PogProdData>() {
    {
        add(new PogProdData(){{setPogNumber(pogNum);setSetDate(setDate);setDpci("000000003");setPogProductData1(PogProdData1);setPogProductData2(PogProdData2););}});
        add(new PogProdData(){{setPogNumber(pogNum);setSetDate(setDate);setDpci("000000004");setPogProductData1(PogProdData1);setPogProductData2(PogProdData2););}});
        add(new PogProdData(){{setPogNumber(pogNum);setSetDate(setDate);setDpci("000001000");setPogProductData1(PogProdData1);setPogProductData2(PogProdData2););}});
        add(new PogProdData(){{setPogNumber(pogNum);setSetDate(setDate);setDpci("000005555");setPogProductData1(PogProdData1);setPogProductData2(PogProdData2););}});
        add(new PogProdData(){{setPogNumber(pogNum);setSetDate(setDate);setDpci("000006666");setPogProductData1(PogProdData1);setPogProductData2(PogProdData2););}});
    }
};

In C#, I can use LINQ to accomplish this goal. Like this,

ist.Select(x => x.PogNumber).ToArray();

ravthiru · Accepted Answer · 2016-09-20 06:03:08Z

2

You can use some thing like this , assuming PogNumber is Integer

List<PogProdData> list = new ArrayList<PogProdData>();
Integer[] pogNums = list.stream().map(PogProdData::getPogNumber).toArray(Integer[]::new);

edited Sep 20, 2016 at 6:03

answered Sep 20, 2016 at 5:54

ravthiru

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