import java.util.ArrayList;
public final class SpecialStringSorter {
public static String[] sort(String[] list){
ArrayList<String> outbuilder=new ArrayList<String>();
if(list.length<2) throw new RuntimeException();//如果list長度小於2會拋出運行時異常(妳想換掉就換掉,比如說返回本身)
for(int a=2;a<=list.length;a++){ //這壹層循環是叠代輸出括號裏的元素數(a代表輸出中的[]裏的元素數),不斷增加
for(int b=0;b<=list.length-a;b++){ //這壹層循環是叠代輸出括號裏的開頭數
for(int c=b+1;c<=list.length-a+1;c++){//這壹層循環是第二個數
StringBuilder sb=new StringBuilder("[");
sb.append(list[b]);
sb.append(","+list[c]);
for(int d=1;d<a-1;d++){ //這壹層循環是壹個[]內容的生成循環
sb.append(","+list[c+d]);
}
sb.append("]");
outbuilder.add(sb.toString());
}
}
}
String[] result=new String[outbuilder.size()];
int i=0;
for(Object resultBuilder:outbuilder){
result[i]=(String)resultBuilder;
i++;
}
return result;
}
public static void main(String[] args){
String[] test={
"1","2","3","4"
};
String[] sortResult=sort(test);
for(String out:sortResult){
System.out.print(out);
}
}
}