它可能是这样的（阅读代码中的注解）：

// Keyboard input Stream. The JVM will auto-Close this when app ends.
Scanner userInput = new Scanner(System.in);  
    
// To hold supplied Address.
String address = "";
    
// Continue looping for as long as the `address` variable is empty.
while (address.isEmpty()) {
    System.out.print("Enter Address: -> ");  // Ask User for Adress:
    address = userInput.nextLine().trim();   // Get entire keyboard input line:
    /* Validating User Input using the String#matches() method and a
       small Regular Expression (RegEx): `(?i)` Letter case insensative,
       `.*` Any number of alphanumerical characters, ` street` must 
       end with a whitespace and `street` in any letter case.      */
    if (!address.matches("(?i).* street")) {
        // Not a match! Inform User and allow to try again...
        System.out.println("Invalid Address. Must end with the word "
                             + "'Street'. Try Again...");
        System.out.println();
        address = "";  // Empty `address` to ensure reloop.
    }
}

// If we get to this point then validation was successful.
    
// Display the Address in Console Window:
System.out.println("Supplied Address: -> " + address);

你尝试过什么吗？如果没有，你可以分解成以下几个步骤，一步一步地构建你的代码。

使用哪个循环？

您应该首先选择一个循环作为开始。For-loop或Do-while loop？
对于For-loop，它将在循环内重复逻辑给定的次数。
对于Do-While循环，它将重复执行，直到您的逻辑不再满足。

什么函数可用于读取输入？

可用于读取Input的最简单类是Scanner。

代码将是什么样子？

因为你知道你必须重复输入逻辑，直到最后输入了street，所以你可能会得到这样的结果：

Define some useful variables here if necessary
Loop Body Start (Repeat Condition here if you choose for-loop)
  Ask for Input
Loop Body End (Repeat Condition here if you choose do-while loop)

注意，单词automatically意味着如果你的要求没有被满足，你什么也不能做，因为循环意味着如果你的要求还没有完成，循环就会被重复。