Examples of com.ibm.icu.text.UnicodeSet.clear()

com.ibm.icu.text.UnicodeSet.clear()
Removes all of the elements from this set. This set will be empty after this call returns. @stable ICU 2.0

        List list = Arrays.asList(array);
        Set aset = new HashSet(list);
        logln(" *** The source set's size is: " + aset.size());
    //The size reads 4
        UnicodeSet set = new UnicodeSet();
        set.clear();
        set.addAll(aset);
        logln(" *** After addAll, the UnicodeSet size is: " + set.size());
    //The size should also read 4, but 0 is seen instead


    }

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    s.applyPattern("[a-z {\u4E01\u4E02}{\\n\\r}]");
    expectToPattern(s, "[a-z{\\u000A\\u000D}{\\u4E01\\u4E02}]",
        new String[] {"\u4E01\u4E02", "\n\r"});
    
    s.clear();
    s.add("abc");
    s.add("abc");
    expectToPattern(s, "[{abc}]",
        new String[] {"abc", NOT, "ab"});

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    s.add("abc");
    expectToPattern(s, "[{abc}]",
        new String[] {"abc", NOT, "ab"});
    
    // JB#3400: For 2 character ranges prefer [ab] to [a-b]
    s.clear(); 
    s.add('a', 'b');
    expectToPattern(s, "[ab]", null);
    
    // Cover applyPattern, applyPropertyAlias
    s.clear();

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    s.clear(); 
    s.add('a', 'b');
    expectToPattern(s, "[ab]", null);
    
    // Cover applyPattern, applyPropertyAlias
    s.clear();
    s.applyPattern("[ab ]", true);
    expectToPattern(s, "[ab]", new String[] {"a", NOT, "ab", " "});
    s.clear();
    s.applyPattern("[ab ]", false);
    expectToPattern(s, "[\\ ab]", new String[] {"a", "\u0020", NOT, "ab"});

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    // Cover applyPattern, applyPropertyAlias
    s.clear();
    s.applyPattern("[ab ]", true);
    expectToPattern(s, "[ab]", new String[] {"a", NOT, "ab", " "});
    s.clear();
    s.applyPattern("[ab ]", false);
    expectToPattern(s, "[\\ ab]", new String[] {"a", "\u0020", NOT, "ab"});
    
    s.clear();
    s.applyPropertyAlias("nv", "0.5");

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    expectToPattern(s, "[ab]", new String[] {"a", NOT, "ab", " "});
    s.clear();
    s.applyPattern("[ab ]", false);
    expectToPattern(s, "[\\ ab]", new String[] {"a", "\u0020", NOT, "ab"});
    
    s.clear();
    s.applyPropertyAlias("nv", "0.5");
    expectToPattern(s, "[\\u00BD\\u0D74\\u0F2A\\u2CFD\\U00010141\\U00010175\\U00010176]", null);
    // Unicode 5.1 adds Malayalam 1/2 (\u0D74)
    
    s.clear();

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    s.clear();
    s.applyPropertyAlias("nv", "0.5");
    expectToPattern(s, "[\\u00BD\\u0D74\\u0F2A\\u2CFD\\U00010141\\U00010175\\U00010176]", null);
    // Unicode 5.1 adds Malayalam 1/2 (\u0D74)
    
    s.clear();
    s.applyPropertyAlias("gc", "Lu");
    // TODO expectToPattern(s, what?)


    // RemoveAllStrings()
    s.clear();

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    s.clear();
    s.applyPropertyAlias("gc", "Lu");
    // TODO expectToPattern(s, what?)


    // RemoveAllStrings()
    s.clear();
    s.applyPattern("[a-z{abc}{def}]");
    expectToPattern(s, "[a-z{abc}{def}]", null);
    s.removeAllStrings();
    expectToPattern(s, "[a-z]", null);
  }

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    set.add('a');
    if (set.isEmpty()) {
      errln("FAIL, set shouldn't be empty but is: " +
          set);
    }
    set.clear();
    if (!set.isEmpty()) {
      errln("FAIL, set should be empty but isn't: " +
          set);
    }

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      errln("FAIL, set should be empty but isn't: " +
          set);
    }
    
    // size()
    set.clear();
    if (set.size() != 0) {
      errln("FAIL, size should be 0, but is " + set.size() +
          ": " + set);
    }
    set.add('a');

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