Java 如何从由数组对象组成的ArrayList中检索数据
我的arraylist包含字符串数组对象。 如何获取所有值? 我的代码在下面Java 如何从由数组对象组成的ArrayList中检索数据,java,android,Java,Android,我的arraylist包含字符串数组对象。 如何获取所有值? 我的代码在下面 String cordinates1c,cordinates2l,cordinates2m; String[] array1={cordinates1c,cordinates2l,cordinates2m}; String[] array2={cordinates1c,cordinates2l,cordinates2m}; ArrayList alist=new ArrayLis
String cordinates1c,cordinates2l,cordinates2m;
String[] array1={cordinates1c,cordinates2l,cordinates2m};
String[] array2={cordinates1c,cordinates2l,cordinates2m};
ArrayList alist=new ArrayList();
alist.add(array1);
alist.add(array2);
//retreieving
for(int i=0;i<alist.size();i++)
System.out.println("arrayList="+alist.get(i));
如何执行此操作?应在Arrays.toString或Arrays.deepToString的帮助下打印数组
应在Arrays.toString或Arrays.deepToString的帮助下打印数组 您还必须迭代字符串数组
ArrayList<String[]> l;
for (String[] a : l) {
for (String s : a) {
System.out.println(s);
}
}
您还必须迭代字符串数组。希望您尝试在数组1中打印字符串
ArrayList<String[]> l;
for (String[] a : l) {
for (String s : a) {
System.out.println(s);
}
}
ArrayList<String> alist= (ArrayList<String>) Arrays.asList(array1);
希望您正在尝试打印数组1中的字符串
ArrayList<String> alist= (ArrayList<String>) Arrays.asList(array1);
你在找这样的东西吗
String cordinates1c = "1", cordinates2l = "2", cordinates2m = "3";
String[] array1 = {cordinates1c, cordinates2l, cordinates2m};
String[] array2 = {cordinates1c, cordinates2l, cordinates2m};
List<String []> alist=new ArrayList<String []>();
alist.add(array1);
alist.add(array2);
for (String[] strings : alist) {
System.out.println(StringUtils.join(strings));
}
输出:
123
123你在找这样的东西吗
String cordinates1c = "1", cordinates2l = "2", cordinates2m = "3";
String[] array1 = {cordinates1c, cordinates2l, cordinates2m};
String[] array2 = {cordinates1c, cordinates2l, cordinates2m};
List<String []> alist=new ArrayList<String []>();
alist.add(array1);
alist.add(array2);
for (String[] strings : alist) {
System.out.println(StringUtils.join(strings));
}
输出:
123
123您可以迭代列表,然后使用Arrays.toString或Arrays.deepToString打印数组内容
for (String[] eachArray : alist) {
System.out.println("arrayList=" + Arrays.deepToString(eachArray));
}
您可以迭代列表,然后使用Arrays.toString或Arrays.deepToString打印数组内容
for (String[] eachArray : alist) {
System.out.println("arrayList=" + Arrays.deepToString(eachArray));
}
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