为什么我的编译器一直说我有一个没有之前 try 块的 catch 块

Why does my compiler keep saying I have a catch block without a previous try block

所以我的代码是这样的:

try {
    t.delete("word");
    result = t.getRootItem().getWord().equals("humpty");
} catch (Exception e) {
    result = false;
}

问题是我的编译器一直说我没有事先尝试就成功了,但我确实有过尝试,这是怎么回事?这是我的整个主要方法(如果需要,我也可以 post 整个 class:

public static void main(String args[]) {
    BSTRefBased t;
    AbstractBinaryTree tt;
    int i;
    boolean result;
    String message;

    message = "Test 1: inserting 'word0' -- ";
    t = new BSTRefBased();
    try {
        t.insert("word0");
        result = t.getRootItem().getWord().equals("word0");
    } catch (Exception e) {
        result = false;
    }
    System.out.println(message + (result ? "passed" : "FAILED"));

    message = "Test 2: inserting 'word1', 'word2', 'word3' -- ";
    t = new BSTRefBased();
    try {
        t.insert("word1");
        t.insert("word2");
        t.insert("word3");
        result = t.getRootItem().getWord().equals("word1");
        tt = t.detachLeftSubtree();
        result &= tt.getRootItem().getWord().equals("word2");
        tt = t.detachRightSubtree();
        result &= tt.getRootItem().getWord().equals("word3");
    } catch (Exception e) {
        result = false;
    }
    System.out.println(message + (result ? "passed" : "FAILED"));

    message = "Test 3: deleting 'word3'";
    t = new BSTRefBased
    try {
        t.delete("word3");
        result = t.getRootItem().getWord().equals("word3");
    } catch (Exception e) {
        result = false;
    }
    System.out.println(message + (result ? "passed" : "FAILED"));
}

此行似乎不正确:

t = new BSTRefBased

构造函数调用没有(),也没有分号。它就在 try 之前,这些错误一定会扰乱解析器,以至于它不再识别 try。尝试

t = new BSTRefBased();  // or a similar constructor call