Java 实例 - 压栈出栈的方法实现字符串反转
以下实例演示了使用用户自定义的方法 StringReverserThroughStack() 来实现字符串反转：
StringReverserThroughStack.java 文件
import java.io.IOException;
public class StringReverserThroughStack {
private String input;
private String output;
public StringReverserThroughStack(String in) {
input = in;
}
public String doRev() {
int stackSize = input.length();
Stack theStack = new Stack(stackSize);
for (int i = 0; i < input.length(); i++) {
char ch = input.charAt(i);
theStack.push(ch);
}
output = "";
while (!theStack.isEmpty()) {
char ch = theStack.pop();
output = output + ch;
}
return output;
}
public static void main(String[] args)
throws IOException {
String input = "www.w3cschool.cc";
String output;
StringReverserThroughStack theReverser =
new StringReverserThroughStack(input);
output = theReverser.doRev();
System.out.println("反转前： " + input);
System.out.println("反转后： " + output);
}
class Stack {
private int maxSize;
private char[] stackArray;
private int top;
public Stack(int max) {
maxSize = max;
stackArray = new char[maxSize];
top = -1;
}
public void push(char j) {
stackArray[++top] = j;
}
public char pop() {
return stackArray[top--];
}
public char peek() {
return stackArray[top];
}
public boolean isEmpty() {
return (top == -1);
}
}
}
以上代码运行输出结果为：
反转前： www.w3cschool.cc 反转后： cc.loohcsc3w.www