String倒敘:
1.將String字符串進行char數組得轉換
2.循環:首尾互換,進行數組長度一半的循環次數
public class ReversalString {
public static void main(String[] args) {String a="hello world";
char [] aArray=a.toCharArray();
for(int i=0,j=aArray.length-1;i<aArray.length/2;i++,j--){
char temp=aArray[i];
aArray[i]=aArray[j];
aArray[j]=temp;
}
for (int i = 0; i < aArray.length; i++) {
System.out.print(aArray[i]);
}
}
}