Java 番石榴| Booleans.compare()方法与示例

原文:https://www . geesforgeks . org/Java-guava-booleans-compare-method-with-examples/

番石榴库中 布尔类 的 compare() 方法用于比较两个指定的布尔值。这些值作为参数传递，比较的结果是第一个值和第二个值的差值。因此它可以是正的、零的或负的。

语法:

public static int compare(boolean a, boolean b)

参数:该方法接受两个参数:

  • a: 是第一个要比较的布尔对象。
  • b: 这是要比较的第二个布尔对象。

返回值:这个方法返回一个 int 值。它返回:

  • 如果“a”等于“b”，则为 0，
  • 如果“a”为真而“b”为假，则为正值，
  • 如果“a”为假，“b”为真，则为负值

异常:该方法不抛出任何异常。

下面的程序说明了 Booleans.compare()方法:

例 1:

// Java code to show implementation of
// Guava's Booleans.compare() method

import com.google.common.primitives.Booleans;

class GFG {
    public static void main(String[] args)
    {
        boolean a = true;
        boolean b = true;

        // compare method in Booleans class
        int output = Booleans.compare(a, b);

        // printing the output
        System.out.println("Comparing " + a
                           + " and " + b + " : "
                           + output);
    }
}

Output:

Comparing true and true : 0

例 2:

// Java code to show implementation of
// Guava's Booleans.compare() method

import com.google.common.primitives.Booleans;

class GFG {
    public static void main(String[] args)
    {
        boolean a = true;
        boolean b = false;

        // compare method in Booleans class
        int output = Booleans.compare(a, b);

        // printing the output
        System.out.println("Comparing " + a
                           + " and " + b + " : "
                           + output);
    }
}

Output:

Comparing true and false : 1

例 3:

// Java code to show implementation of
// Guava's Booleans.compare() method

import com.google.common.primitives.Booleans;

class GFG {
    public static void main(String[] args)
    {

        boolean a = false;
        boolean b = true;

        // compare method in Booleans class
        int output = Booleans.compare(a, b);

        // printing the output
        System.out.println("Comparing " + a
                           + " and " + b + " : "
                           + output);
    }
}

Output:

Comparing false and true : -1

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