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public void buildRegDecoratedTree(int treeHight) {
 
        //CREATE ROWS OF TREE LOOP
        for (int row = 0; row < treeHight; row++) {
            int maxWidth = (row * 2) + 1;
 
            //ADDING INDENTATION LOOP
            for (int indentation = 0; indentation < treeHight - row - 1; indentation++) {
                tree.append(" ");
            }
 
            //ADDING TREE SYMBOL WITH ORNAMENTS LOOP
            for (int symbol = 1, arrIndex = -1; symbol <= maxWidth; symbol++, arrIndex++) {
 
                if (symbol % 2 == 0 && arrIndex < ornaments.length) {
                    tree.append(ornaments[arrIndex]);
                    arrIndex--;
                }
                else if (arrIndex == ornaments.length) {
                    arrIndex = 0;
                    tree.append(ornaments[arrIndex]);
                    arrIndex--;
                }
                else {
                    tree.append(treeSymbol);
                }
            }
            tree.append(System.lineSeparator());
        }
        System.out.println(tree.toString());
    }

Main.java:1: error: class, interface, or enum expected
public void buildRegDecoratedTree(int treeHight) {
       ^
Main.java:4: error: class, interface, or enum expected
        for (int row = 0; row < treeHight; row++) {
                          ^
Main.java:4: error: class, interface, or enum expected
        for (int row = 0; row < treeHight; row++) {
                                           ^
Main.java:8: error: class, interface, or enum expected
            for (int indentation = 0; indentation < treeHight - row - 1; indentation++) {
            ^
Main.java:8: error: class, interface, or enum expected
            for (int indentation = 0; indentation < treeHight - row - 1; indentation++) {
                                      ^
Main.java:8: error: class, interface, or enum expected
            for (int indentation = 0; indentation < treeHight - row - 1; indentation++) {
                                                                         ^
Main.java:10: error: class, interface, or enum expected
            }
            ^
Main.java:13: error: class, interface, or enum expected
            for (int symbol = 1, arrIndex = -1; symbol <= maxWidth; symbol++, arrIndex++) {
                                                ^
Main.java:13: error: class, interface, or enum expected
            for (int symbol = 1, arrIndex = -1; symbol <= maxWidth; symbol++, arrIndex++) {
                                                                    ^
Main.java:17: error: class, interface, or enum expected
                    arrIndex--;
                    ^
Main.java:18: error: class, interface, or enum expected
                }
                ^
Main.java:21: error: class, interface, or enum expected
                    tree.append(ornaments[arrIndex]);
                    ^
Main.java:22: error: class, interface, or enum expected
                    arrIndex--;
                    ^
Main.java:23: error: class, interface, or enum expected
                }
                ^
Main.java:26: error: class, interface, or enum expected
                }
                ^
Main.java:29: error: class, interface, or enum expected
        }
        ^
Main.java:31: error: class, interface, or enum expected
    }
    ^
17 errors

Standard output is empty